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Pocono tunnel, D.L. & W. R.R. - Public domain image. Dry plate negative.

Pocono tunnel, D.L. & W. R.R. - Public domain image. Dry plate negativ...

Picryl description: Public domain image of an arch stone structure, bridge, or tunnel, free to use, no copyright restrictions.

[From the tunnel, Baidar, the Crimea, Russia, (i.e., Ukraine)]

[From the tunnel, Baidar, the Crimea, Russia, (i.e., Ukraine)]

Title from the Detroit Publishing Co., catalogue J foreign section, Detroit, Mich. : Detroit Publishing Company, 1905. Print no. "8884". Forms part of: Views of architecture and other sites primarily in Poland,... More

Train leaving tunnel along Manawatu Gorge

Train leaving tunnel along Manawatu Gorge

Gift; William P. Meeker; 1971. Forms part of: Jackson, William Henry, 1843-1942. World's Transportation Commission photograph collection (Library of Congress).

Tracks and train cars in Chicago freight tunnel

Tracks and train cars in Chicago freight tunnel

Public domain historical photo, free to use, no copyright restrictions image - Picryl description

[Michigan Central Railroad tunnel, Detroit, Mich.]

[Michigan Central Railroad tunnel, Detroit, Mich.]

Picryl description: Public domain image of a historic building in Detroit, Michigan, free to use, no copyright restrictions.

Tunnel walk, Highland Park, Pittsburgh, Pennsylvania

Tunnel walk, Highland Park, Pittsburgh, Pennsylvania

Public domain photograph - historical image of Pennsylvania, United States, free to use, no copyright restrictions image - Picryl description

[Dead (?) coal miner under rock after cave-in in tunnel]

[Dead (?) coal miner under rock after cave-in in tunnel]

Title and other information transcribed from caption card and item. LOT subdivision subject: Mining & Drilling. National Photo Company Collection (Library of Congress). No. 6478. Formerly in LOT 11509-530 - Coa... More

[Detroit River tunnel, Detroit, Mich.]

[Detroit River tunnel, Detroit, Mich.]

Picryl description: Public domain image of railway tracks, train station, railroad building, free to use, no copyright restrictions.

[Petra (Wadi Musa). El Muzlim tunnel. Tunnel made to drain water away from es-Siq]

[Petra (Wadi Musa). El Muzlim tunnel. Tunnel made to drain water away ...

Public domain photograph of landscape view, nature, stereoscopic card, free to use, no copyright restrictions image - Picryl description

Petra (Wadi Musa). Eagle shrine. In gully near north end of el Muzlim tunnel

Petra (Wadi Musa). Eagle shrine. In gully near north end of el Muzlim ...

Public domain photograph of Egypt, stereoscopic card, free to use, no copyright restrictions image - Picryl description

A black and white photo of a mountain road, West Virginia. Farm Security Administration photograph.

A black and white photo of a mountain road, West Virginia. Farm Securi...

Picryl description: Public domain historical photograph of 1930s America during the Great Depression, free to use, no copyright restrictions image.

Turlock, California. Chopped and blanched cabbage ready for the drying tunnel at dehydrating plant

Turlock, California. Chopped and blanched cabbage ready for the drying...

Public domain photograph - California, United States, World War Two, free to use, no copyright restrictions image - Picryl description

Milwaukee Western Fuel Company, Milwaukee, Wisconsin. Steps leading up into the underground tunnel at the Seventeenth Street dock of the Milwaukee Western Fuel Company

Milwaukee Western Fuel Company, Milwaukee, Wisconsin. Steps leading up...

Public domain photograph of 1930s America, free to use, no copyright restrictions image - Picryl description

Public domain image of New york city cityscape, free to use, no copyright restrictions image - Picryl description

Public domain image of New york city cityscape, free to use, no copyri...

Public domain photograph of early 20th-century New York metropolis cityscape, buildings, no copyright restrictions image - Picryl description

Historic Columbia River Highway, Oneonta Tunnel, Adjacent to Historic Columbia River Highway through Oneonta Point, Troutdale, Multnomah County, OR

Historic Columbia River Highway, Oneonta Tunnel, Adjacent to Historic ...

Significance: One of four tunnels on the Historic Columbia River Highway. Survey number: HAER OR-36-L Building/structure dates: 1914 Initial Construction Building/structure dates: 1948 Subsequent Work Build... More

A kiss in the dark: mischievous conductor,--"dark tunnel, through in half an hour!" scene,--when the train struck the light in just 3 minutes

A kiss in the dark: mischievous conductor,--"dark tunnel, through in h...

Currier & Ives : a catalogue raisonné / compiled by Gale Research. Detroit, MI : Gale Research, c1983, no. 3613

Big Oak Flat Road Tunnel No. 3, Through mountain spur on New Big Oak Flat Road, Yosemite Village, Mariposa County, CA

Big Oak Flat Road Tunnel No. 3, Through mountain spur on New Big Oak F...

part of Yosemite Roads and Bridges Recording Project, 1991; see HAER No. CA-117 for overview Unprocessed Field note material exists for this structure: N77 Unprocessed Field note material exists for this struc... More

Banff up Bow River from Tunnel Mt., Alberta, Canada

Banff up Bow River from Tunnel Mt., Alberta, Canada

Picryl description: Public domain view of a mountain range, mountainous landscape, free to use, no copyright restrictions.

Zion-Mount Carmel Highway, Short Tunnel, Passing through Rock Spur on Zion-Mount Carmel Highway, Springdale, Washington County, UT

Zion-Mount Carmel Highway, Short Tunnel, Passing through Rock Spur on ...

Significance: The development of the Zion-Mt. Carmel Highway is significant to the development of the National Parks in Utah and Arizona. Access to the for parks in this area, Bryce Canyon, Grand Canyon, Cedar... More

Board Tree Tunnel, Littleton, Wetzel County, WV

Board Tree Tunnel, Littleton, Wetzel County, WV

Significance: The Board Tree Tunnel is one of the first major railroad tunnels in the United States. The tunnel along with the original B&O line from Baltimore to Wheeling is a tribute to three important 19th ... More

Board Tree Tunnel, Littleton, Wetzel County, WV

Board Tree Tunnel, Littleton, Wetzel County, WV

Significance: The Board Tree Tunnel is one of the first major railroad tunnels in the United States. The tunnel along with the original B&O line from Baltimore to Wheeling is a tribute to three important 19th ... More

Board Tree Tunnel, Littleton, Wetzel County, WV

Board Tree Tunnel, Littleton, Wetzel County, WV

Significance: The Board Tree Tunnel is one of the first major railroad tunnels in the United States. The tunnel along with the original B&O line from Baltimore to Wheeling is a tribute to three important 19th ... More

Board Tree Tunnel, Littleton, Wetzel County, WV

Board Tree Tunnel, Littleton, Wetzel County, WV

Significance: The Board Tree Tunnel is one of the first major railroad tunnels in the United States. The tunnel along with the original B&O line from Baltimore to Wheeling is a tribute to three important 19th ... More

Board Tree Tunnel, Littleton, Wetzel County, WV

Board Tree Tunnel, Littleton, Wetzel County, WV

Significance: The Board Tree Tunnel is one of the first major railroad tunnels in the United States. The tunnel along with the original B&O line from Baltimore to Wheeling is a tribute to three important 19th ... More

Delaware, Lackawanna & Western Railroad, North Bergen Tunnel, Through Bergen Hill from Prospect Street at Ogden Avenue to John F. Kennedy Boulevard at Beacon Avenue, Jersey City, Hudson County, NJ

Delaware, Lackawanna & Western Railroad, North Bergen Tunnel, Through ...

Significance: The North Bergen Tunnel is significant for its role in the development and expansion of the D.L&W. Railroad system. The tunnel was one of the first major construction projects undertaken after the... More

Portland & Southwestern Railroad Tunnel, Willamette Meridian, Chapman, Columbia County, OR

Portland & Southwestern Railroad Tunnel, Willamette Meridian, Chapman,...

Significance: The Portland and Southwestern Railroad Tunnel is one of the longer semi-temporary railroad tunnels built for logging transport in Oregon and the only tunnel to cross the divide of the Oregon coast... More

Portland & Southwestern Railroad Tunnel, Willamette Meridian, Chapman, Columbia County, OR

Portland & Southwestern Railroad Tunnel, Willamette Meridian, Chapman,...

Significance: The Portland and Southwestern Railroad Tunnel is one of the longer semi-temporary railroad tunnels built for logging transport in Oregon and the only tunnel to cross the divide of the Oregon coast... More

Hoover Dam, Nevada Downstream Waste Tailings, Near the Lower Portal Tunnel Access Road, Boulder City, Clark County, NV

Hoover Dam, Nevada Downstream Waste Tailings, Near the Lower Portal Tu...

Significance: They were an important feature in the construction of Hoover Dam. The tailings resulted from excavation of tunnels for diversion of the Colorado River, for penstock and spillway facilities, for lo... More

Hoover Dam, Nevada Downstream Waste Tailings, Near the Lower Portal Tunnel Access Road, Boulder City, Clark County, NV

Hoover Dam, Nevada Downstream Waste Tailings, Near the Lower Portal Tu...

Significance: They were an important feature in the construction of Hoover Dam. The tailings resulted from excavation of tunnels for diversion of the Colorado River, for penstock and spillway facilities, for lo... More

Delaware, Lackawanna & Western Railroad, South Bergen Tunnel, Jersey City, Hudson County, NJ

Delaware, Lackawanna & Western Railroad, South Bergen Tunnel, Jersey C...

Significance: The South Bergen Tunnel is technologically significant for its innovative concrete technology and is historically significant because it reflected the dramatic increase in railroad freight operati... More

Delaware, Lackawanna & Western Railroad, South Bergen Tunnel, Jersey City, Hudson County, NJ

Delaware, Lackawanna & Western Railroad, South Bergen Tunnel, Jersey C...

Significance: The South Bergen Tunnel is technologically significant for its innovative concrete technology and is historically significant because it reflected the dramatic increase in railroad freight operati... More

Delaware, Lackawanna & Western Railroad, South Bergen Tunnel, Jersey City, Hudson County, NJ

Delaware, Lackawanna & Western Railroad, South Bergen Tunnel, Jersey C...

Significance: The South Bergen Tunnel is technologically significant for its innovative concrete technology and is historically significant because it reflected the dramatic increase in railroad freight operati... More

Naval Surface Warfare Center, Supersonic Wind Tunnel Building, Bounded by Clara Barton Parkway & McArthur Boulevard, Silver Spring, Montgomery County, MD

Naval Surface Warfare Center, Supersonic Wind Tunnel Building, Bounded...

Significance: The Supersonic Wind Tunnel Building is an aviation testing facility contained within the Naval Surface Warfare Center (NSWC) Carderock Division Historic District. As the center for naval research... More

Allegheny Portage Railroad, Staple Bend Tunnel, East of Cambria Railroad Bridge (Conemaugh Township), Geistown, Cambria County, PA

Allegheny Portage Railroad, Staple Bend Tunnel, East of Cambria Railro...

Survey number: HABS PA-1233 National Register of Historic Places NRIS Number: 94001187

Baltimore & Ohio Railroad, Howard Street Tunnel, 1300 Mount Royal Avenue, Baltimore, Independent City, MD

Baltimore & Ohio Railroad, Howard Street Tunnel, 1300 Mount Royal Aven...

Significance: The Baltimore Belt Railroad, chartered in 1888, built the Howard Street Tunnel. The seven-mile-long railroad connected the main branch of the Baltimore and Ohio Railroad that extends westward wit... More

Central Pacific Transcontinental Railroad, Tunnel No. 24, Milepost 132.9, Applegate, Placer County, CA

Central Pacific Transcontinental Railroad, Tunnel No. 24, Milepost 132...

Significance: The Central Pacific First Transcontinental Railroad is a segment of the western half of the first transcontinental railroad, built from Sacramento, California to Promontory Summit, Utah between 18... More

St. Clair Tunnel, Port Huron Pump House, Southwest of west portal, Port Huron, St. Clair County, MI

St. Clair Tunnel, Port Huron Pump House, Southwest of west portal, Por...

Significance: This pump house has served as a critical component of the drainage system built to prevent surface runoff from the 11.50-acre watershed created by the open-cut approach to the Port Huron (west) po... More

Naval Magazine Lualualei, Waikele Branch, Tunnel Magazine Type, Waikakalaua & Kipapa Gulches, Pearl City, Honolulu County, HI

Naval Magazine Lualualei, Waikele Branch, Tunnel Magazine Type, Waikak...

Significance: These tunnel structures serve as excellent examples of unique military construction from the 1940s, and are significant as part of the World War II era base construction. Survey number: HABS HI-262

Salinas River Project, Cuesta Tunnel, Southeast of U.S. 101, San Luis Obispo, San Luis Obispo County, CA

Salinas River Project, Cuesta Tunnel, Southeast of U.S. 101, San Luis ...

Significance: The Cuesta Tunnel is important as an example of the heroic engineering and construction undertaken by the U.S. Army Quartermaster Corps in the early 1940s as part of the mobilization of American f... More

Salinas River Project, Cuesta Tunnel, Southeast of U.S. 101, San Luis Obispo, San Luis Obispo County, CA

Salinas River Project, Cuesta Tunnel, Southeast of U.S. 101, San Luis ...

Significance: The Cuesta Tunnel is important as an example of the heroic engineering and construction undertaken by the U.S. Army Quartermaster Corps in the early 1940s as part of the mobilization of American f... More

Salinas River Project, Cuesta Tunnel, Southeast of U.S. 101, San Luis Obispo, San Luis Obispo County, CA

Salinas River Project, Cuesta Tunnel, Southeast of U.S. 101, San Luis ...

Significance: The Cuesta Tunnel is important as an example of the heroic engineering and construction undertaken by the U.S. Army Quartermaster Corps in the early 1940s as part of the mobilization of American f... More

Salinas River Project, Cuesta Tunnel, Southeast of U.S. 101, San Luis Obispo, San Luis Obispo County, CA

Salinas River Project, Cuesta Tunnel, Southeast of U.S. 101, San Luis ...

Significance: The Cuesta Tunnel is important as an example of the heroic engineering and construction undertaken by the U.S. Army Quartermaster Corps in the early 1940s as part of the mobilization of American f... More

North Pennsylvania Railroad, Landis Ridge Tunnel, Beneath Landis Ridge & State Route 563, Perkasie, Bucks County, PA

North Pennsylvania Railroad, Landis Ridge Tunnel, Beneath Landis Ridge...

Picryl description: Public domain image of an arch stone structure, bridge, or tunnel, free to use, no copyright restrictions.

Vicksburg National Military Park Roads & Bridges, Vicksburg, Warren County, MS

Vicksburg National Military Park Roads & Bridges, Vicksburg, Warren Co...

Significance: The Vicksburg National Military Park tour roads provide access to areas of interest in the park, which commemorates and interprets the siege and defense of Vicksburg in 1863 during the Civil War. ... More

Montezuma Valley Irrigation Company System, Tunnel, Dolores, Montezuma County, CO

Montezuma Valley Irrigation Company System, Tunnel, Dolores, Montezuma...

Survey number: HAER CO-4-A Building/structure dates: ca. 1885 Initial Construction

Pittsburgh & Steubenville Extension Railroad Tunnel, Between Fifth & Sixth Streets, East of Grant Street, Pittsburgh, Allegheny County, PA

Pittsburgh & Steubenville Extension Railroad Tunnel, Between Fifth & S...

Significance: The Pittsburgh and Steubenville Extension Railroad Tunnel was a section of the Pittsburgh rail link between the Pennsylvania Railroad's western terminus and the eastern terminus of the Steubenvill... More

Pittsburgh & Steubenville Extension Railroad Tunnel, Between Fifth & Sixth Streets, East of Grant Street, Pittsburgh, Allegheny County, PA

Pittsburgh & Steubenville Extension Railroad Tunnel, Between Fifth & S...

Significance: The Pittsburgh and Steubenville Extension Railroad Tunnel was a section of the Pittsburgh rail link between the Pennsylvania Railroad's western terminus and the eastern terminus of the Steubenvill... More

Wawona Tunnel, Wawona Road through Turtleback Dome, Yosemite Village, Mariposa County, CA

Wawona Tunnel, Wawona Road through Turtleback Dome, Yosemite Village, ...

part of Yosemite National Park Roads and Bridges Recording Project, 1991; see HAER No. CA-117 for overview Significance: The longest vehicular tunnel in the western United States at the time of construction, th... More

Promenade Street Interlocking Tower, Promenade Street between Union Station & East Side Tunnel Viaduct, Providence, Providence County, RI

Promenade Street Interlocking Tower, Promenade Street between Union St...

Significance: The structure houses the interlocking n signal equipment which regulates all train movements on the east end of Union Station for the main rail to Boston and for the east side branch to Bristol. ... More

Naval Surface Warfare Center, Subsonic Wind Tunnel Building, Bounded by Clara Barton Parkway & McArthur Boulevard, Silver Spring, Montgomery County, MD

Naval Surface Warfare Center, Subsonic Wind Tunnel Building, Bounded b...

Significance: The Subsonic Wind Tunnel Building is an aviation facility contained within the Naval Surface Warfare Center (NSWC) Carderock Division Historic District. Naval Surface Warfare Center is associated... More

Naval Surface Warfare Center, Subsonic Wind Tunnel Building, Bounded by Clara Barton Parkway & McArthur Boulevard, Silver Spring, Montgomery County, MD

Naval Surface Warfare Center, Subsonic Wind Tunnel Building, Bounded b...

Significance: The Subsonic Wind Tunnel Building is an aviation facility contained within the Naval Surface Warfare Center (NSWC) Carderock Division Historic District. Naval Surface Warfare Center is associated... More

Zion-Mount Carmel Highway, Tunnel, Two miles east of Zion Canyon Scenic Drive, Springdale, Washington County, UT

Zion-Mount Carmel Highway, Tunnel, Two miles east of Zion Canyon Sceni...

Significance: The 5,613-foot long, rock-faced Zion-Mount Carmel Tunnel with concrete spines was completed in 1930 and retains structural integrity. It is one of the most spectacular manmade sites at Zion Natio... More

Zion-Mount Carmel Highway, Tunnel, Two miles east of Zion Canyon Scenic Drive, Springdale, Washington County, UT

Zion-Mount Carmel Highway, Tunnel, Two miles east of Zion Canyon Sceni...

Significance: The 5,613-foot long, rock-faced Zion-Mount Carmel Tunnel with concrete spines was completed in 1930 and retains structural integrity. It is one of the most spectacular manmade sites at Zion Natio... More

Forts Baker-Barry Tunnel, Under Lime Point Ridge on Bunker Road, Sausalito, Marin County, CA

Forts Baker-Barry Tunnel, Under Lime Point Ridge on Bunker Road, Sausa...

Public domain photograph of rural landscape, California, no copyright restrictions image - Picryl description

Forts Baker-Barry Tunnel, Under Lime Point Ridge on Bunker Road, Sausalito, Marin County, CA

Forts Baker-Barry Tunnel, Under Lime Point Ridge on Bunker Road, Sausa...

Picryl description: Public domain image of an arch stone structure, bridge, or tunnel, free to use, no copyright restrictions.

New York, West Shore & Buffalo Railroad, Weehawken Tunnel, Weehawken, Hudson County, NJ

New York, West Shore & Buffalo Railroad, Weehawken Tunnel, Weehawken, ...

Significance: The New York, West Shore & Buffalo Railroad Weehawken Tunnel is significant in the development of freight and passenger rail service in New York Harbor in the late nineteenth and early twentieth c... More

Western Maryland Railway, Cumberland Extension, Pearre to North Branch, from WM milepost 125 to 160, Pearre, Washington County, MD

Western Maryland Railway, Cumberland Extension, Pearre to North Branch...

Significance: The westward expansion of the Western Maryland Railway, beginning with the Cumberland Extension, was one of the last new mainlines constructed during the U.S. railroads' period of extensive growth... More

Western Maryland Railway, Cumberland Extension, Pearre to North Branch, from WM milepost 125 to 160, Pearre, Washington County, MD

Western Maryland Railway, Cumberland Extension, Pearre to North Branch...

Significance: The westward expansion of the Western Maryland Railway, beginning with the Cumberland Extension, was one of the last new mainlines constructed during the U.S. railroads' period of extensive growth... More

Baltimore & Ohio Railroad, Martinsburg Repair Shops, West Side of Tuscarora Creek Opposite East End of Race Street, Martinsburg, Berkeley County, WV

Baltimore & Ohio Railroad, Martinsburg Repair Shops, West Side of Tusc...

Significance: Since the Baltimore and Ohio Railroad Company felt that the facilities at Sandy Hook, Maryland, were inadequate, in 1849, $35,000 was spent for construction of various structures at Martinsburg to... More

East Broad Top Railroad & Coal Company, Sideling Hill Tunnel, Rockhill Furnace, Huntingdon County, PA

East Broad Top Railroad & Coal Company, Sideling Hill Tunnel, Rockhill...

Survey number: HAER PA-127-F Building/structure dates: ca. 1874 Initial Construction National Register of Historic Places NRIS Number: 66000666

Hempfield Viaduct & Tunnel No. 1, Spanning Wheeling Creek at B&O Railroad tracks near I-70, Wheeling, Ohio County, WV

Hempfield Viaduct & Tunnel No. 1, Spanning Wheeling Creek at B&O Railr...

Survey number: HAER WV-80 Public domain photograph of the train tunnel, railroad, train track, free to use, no copyright restrictions image - Picryl description

Southern Pacific Railroad Natron Cutoff, Tunnel No. 17, Milepost 408, Dorris, Siskiyou County, CA

Southern Pacific Railroad Natron Cutoff, Tunnel No. 17, Milepost 408, ...

Significance: The Southern Pacific Railroad Cascade Route, built as the Natron Cutoff between Black Butte, California and Natron, Oregon was one of a series of major rebuildings and realignments of the original... More

Heading of east portal Tunnel No. 8

Heading of east portal Tunnel No. 8

Photograph shows Chinese railroad worker with a shoulder pole. No. 204. Part of series: Central Pacific Railroad, California. Scenes in the Sierra Nevada Mountains.

Tunnel No. 15. Looking east, toward Nevada

Tunnel No. 15. Looking east, toward Nevada

No. 269. Part of series: Central Pacific Railroad, Nevada. Scenes in the Sierra Nevada Mountains.

Lincoln Tunnel, Under Hudson River from New Jersey to West Thirty-ninth Street, New York City, New York, New York County, NY

Lincoln Tunnel, Under Hudson River from New Jersey to West Thirty-nint...

Survey number: HAER NY-307 Building/structure dates: 1937 Initial Construction

Stanley R. Mickelsen Safeguard Complex, Utility Tunnel, Between Limited Access Patrol Road & Service Road A, Nekoma, Cavalier County, ND

Stanley R. Mickelsen Safeguard Complex, Utility Tunnel, Between Limite...

Significance: The tunnel provides access for personnel and utilities between the Perimeter Acquisition Radar Building (PARB) and its power plant. Survey number: HAER ND-9-Q Building/structure dates: 1972 Init... More

Lost Camp Spur Cut, 80 miles from Sacramento

Lost Camp Spur Cut, 80 miles from Sacramento

No. 162. Part of series: Central Pacific Railroad, California. Scenes in the Sierra Nevada Mountains.

Wright-Patterson Air Force Base, Area B, Building No. 19, Five-Foot Wind Tunnel, Dayton, Montgomery County, OH

Wright-Patterson Air Force Base, Area B, Building No. 19, Five-Foot Wi...

Significance: Building 19 is one of Wright Field's original buildings, today virtually unchanged and still serving the same function. The Five-Foot Wind Tunnel inside is the oldest operating wind tunnel in exi... More

Wright-Patterson Air Force Base, Area B, Building No. 19, Five-Foot Wind Tunnel, Dayton, Montgomery County, OH

Wright-Patterson Air Force Base, Area B, Building No. 19, Five-Foot Wi...

Significance: Building 19 is one of Wright Field's original buildings, today virtually unchanged and still serving the same function. The Five-Foot Wind Tunnel inside is the oldest operating wind tunnel in exi... More

Wright-Patterson Air Force Base, Area B, Building No. 19, Five-Foot Wind Tunnel, Dayton, Montgomery County, OH

Wright-Patterson Air Force Base, Area B, Building No. 19, Five-Foot Wi...

Significance: Building 19 is one of Wright Field's original buildings, today virtually unchanged and still serving the same function. The Five-Foot Wind Tunnel inside is the oldest operating wind tunnel in exi... More

Connecting Railway, Reading Railroad Overpass, Amtrak Northeast Corridor, just north of Schuylkill River, Philadelphia, Philadelphia County, PA

Connecting Railway, Reading Railroad Overpass, Amtrak Northeast Corrid...

Significance: This overpass, one of the early grad-separation structures on Philadelphia's Connecting Railway retains its original brick arches, which are rarely found on U.S. railroads. The bridge is located i... More

Central Pacific Transcontinental Railroad, Tunnel No. 41, Milepost 193.3, Donner, Placer County, CA

Central Pacific Transcontinental Railroad, Tunnel No. 41, Milepost 193...

Significance: The Central Pacific First Transcontinental Railroad is a segment of the western half of the first transcontinental railroad, built from Sacramento, California to Promontory Summit, Utah between 18... More

Hoover Dam, Nevada Spoils Tunnel, Near the Lower Portal Tunnel Access Road, Boulder City, Clark County, NV

Hoover Dam, Nevada Spoils Tunnel, Near the Lower Portal Tunnel Access ...

Significance: It was an important feature in the construction of Hoover Dam. The tunnel that was excavated to allow waste rock from Hoover Dam tunnels and other facilities to be deposited at the Nevada downstre... More

Pennsylvania Railroad, Allegheny Tunnel, Beneath Allegheny Mountain, east of Railroad Street, Gallitzin, Cambria County, PA

Pennsylvania Railroad, Allegheny Tunnel, Beneath Allegheny Mountain, e...

Significance: It is an example of a mid-19th century railroad tunnel featuring ashlar masonry portals and a brick arch lining. Upon completion it was the longest railroad tunnel in America, allowing railcars to... More

Naval Surface Warfare Center, Transonic Wind Tunnel Building, Bounded by Clara Barton Parkway & McArthur Boulevard, Silver Spring, Montgomery County, MD

Naval Surface Warfare Center, Transonic Wind Tunnel Building, Bounded ...

Significance: The Transonic Wind Tunnel Building is an aviation testing facility contained within the Naval Surface Warfare Center (NSWC) Carderock Division Historic District. Naval Surface Warfare Center is a... More

Naval Surface Warfare Center, Transonic Wind Tunnel Building, Bounded by Clara Barton Parkway & McArthur Boulevard, Silver Spring, Montgomery County, MD

Naval Surface Warfare Center, Transonic Wind Tunnel Building, Bounded ...

Significance: The Transonic Wind Tunnel Building is an aviation testing facility contained within the Naval Surface Warfare Center (NSWC) Carderock Division Historic District. Naval Surface Warfare Center is a... More

Naval Surface Warfare Center, Transonic Wind Tunnel Building, Bounded by Clara Barton Parkway & McArthur Boulevard, Silver Spring, Montgomery County, MD

Naval Surface Warfare Center, Transonic Wind Tunnel Building, Bounded ...

Significance: The Transonic Wind Tunnel Building is an aviation testing facility contained within the Naval Surface Warfare Center (NSWC) Carderock Division Historic District. Naval Surface Warfare Center is a... More

Camas Prairie Railroad, Second Subdivision, From Spalding in Nez Perce County, through Lewis County, to Grangeville in Idaho County, Spalding, Nez Perce County, ID

Camas Prairie Railroad, Second Subdivision, From Spalding in Nez Perce...

Significance: It retains 6 of its original 7 tunnels and 44 of its more than 50 original bridges and trestles. These structures enabled the tracks to rise from a starting elevation of approximately 800' by the ... More

Camas Prairie Railroad, Second Subdivision, From Spalding in Nez Perce County, through Lewis County, to Grangeville in Idaho County, Spalding, Nez Perce County, ID

Camas Prairie Railroad, Second Subdivision, From Spalding in Nez Perce...

Significance: It retains 6 of its original 7 tunnels and 44 of its more than 50 original bridges and trestles. These structures enabled the tracks to rise from a starting elevation of approximately 800' by the ... More

Camas Prairie Railroad, Second Subdivision, From Spalding in Nez Perce County, through Lewis County, to Grangeville in Idaho County, Spalding, Nez Perce County, ID

Camas Prairie Railroad, Second Subdivision, From Spalding in Nez Perce...

Significance: It retains 6 of its original 7 tunnels and 44 of its more than 50 original bridges and trestles. These structures enabled the tracks to rise from a starting elevation of approximately 800' by the ... More

Wright-Patterson Air Force Base, Area B, Buildings 25 & 24,10-foot & 20-foot Wind Tunnel Complex, Northeast side of block bounded by K, G, Third, & Fifth Streets, Dayton, Montgomery County, OH

Wright-Patterson Air Force Base, Area B, Buildings 25 & 24,10-foot & 2...

Significance: The 10-Foot and 20-Foot Wind Tunnel complex houses a variety of specialized testing and support facilities, most notably the tunnels themselves. Research conducted in these facilities contributed... More

Wright-Patterson Air Force Base, Area B, Buildings 25 & 24,10-foot & 20-foot Wind Tunnel Complex, Northeast side of block bounded by K, G, Third, & Fifth Streets, Dayton, Montgomery County, OH

Wright-Patterson Air Force Base, Area B, Buildings 25 & 24,10-foot & 2...

Significance: The 10-Foot and 20-Foot Wind Tunnel complex houses a variety of specialized testing and support facilities, most notably the tunnels themselves. Research conducted in these facilities contributed... More

Wright-Patterson Air Force Base, Area B, Buildings 25 & 24,10-foot & 20-foot Wind Tunnel Complex, Northeast side of block bounded by K, G, Third, & Fifth Streets, Dayton, Montgomery County, OH

Wright-Patterson Air Force Base, Area B, Buildings 25 & 24,10-foot & 2...

Significance: The 10-Foot and 20-Foot Wind Tunnel complex houses a variety of specialized testing and support facilities, most notably the tunnels themselves. Research conducted in these facilities contributed... More

Wright-Patterson Air Force Base, Area B, Buildings 25 & 24,10-foot & 20-foot Wind Tunnel Complex, Northeast side of block bounded by K, G, Third, & Fifth Streets, Dayton, Montgomery County, OH

Wright-Patterson Air Force Base, Area B, Buildings 25 & 24,10-foot & 2...

Significance: The 10-Foot and 20-Foot Wind Tunnel complex houses a variety of specialized testing and support facilities, most notably the tunnels themselves. Research conducted in these facilities contributed... More

NASA Langley Research Center, 8-Foot High Speed Wind Tunnel, 641 Thornell Avenue, Hampton, Hampton, Virginia

NASA Langley Research Center, 8-Foot High Speed Wind Tunnel, 641 Thorn...

Significance: The facility was authorized in July 1933 and built by the Public Works Administration for $26,000. It tested complete models of aircraft and aircraft components in a high-speed airstream approach... More

NASA Langley Research Center, 8-Foot High Speed Wind Tunnel, 641 Thornell Avenue, Hampton, Hampton, Virginia

NASA Langley Research Center, 8-Foot High Speed Wind Tunnel, 641 Thorn...

Significance: The facility was authorized in July 1933 and built by the Public Works Administration for $26,000. It tested complete models of aircraft and aircraft components in a high-speed airstream approach... More

Holland Tunnel, Beneath Hudson River between New York & Jersey City, New York, New York County, NY

Holland Tunnel, Beneath Hudson River between New York & Jersey City, N...

Significance: The American Society of Civil Engineers (ASCE) and the American Society of Mechanical Engineers (ASME) jointly designated, on May 2, 1984, the Holland Tunnel as an engineering landmark "... in rec... More

Holland Tunnel, Beneath Hudson River between New York & Jersey City, New York, New York County, NY

Holland Tunnel, Beneath Hudson River between New York & Jersey City, N...

Significance: The American Society of Civil Engineers (ASCE) and the American Society of Mechanical Engineers (ASME) jointly designated, on May 2, 1984, the Holland Tunnel as an engineering landmark "... in rec... More

NASA Langley Research Center, Full-Scale Wind Tunnel, 224 Hunting Avenue, Hampton, Hampton, Virginia

NASA Langley Research Center, Full-Scale Wind Tunnel, 224 Hunting Aven...

Significance: The facility allowed wind tunnel research into fields that could be most effectively investigated with full-scale models and actual aircraft. Until 1945 it was the largest wind tunnel in the world... More

Alaskan Way Viaduct and Battery Street Tunnel, Seattle, King County, WA

Alaskan Way Viaduct and Battery Street Tunnel, Seattle, King County, W...

Significance: The Alaskan Way Viaduct is significant for its double-deck configuration, the first such bridge built in the state of Washington. The structure encompasses two different designs and crosses over ... More

Alaskan Way Viaduct and Battery Street Tunnel, Seattle, King County, WA

Alaskan Way Viaduct and Battery Street Tunnel, Seattle, King County, W...

Significance: The Alaskan Way Viaduct is significant for its double-deck configuration, the first such bridge built in the state of Washington. The structure encompasses two different designs and crosses over ... More

Alaskan Way Viaduct and Battery Street Tunnel, Seattle, King County, WA

Alaskan Way Viaduct and Battery Street Tunnel, Seattle, King County, W...

Significance: The Alaskan Way Viaduct is significant for its double-deck configuration, the first such bridge built in the state of Washington. The structure encompasses two different designs and crosses over ... More

Alaskan Way Viaduct and Battery Street Tunnel, Seattle, King County, WA

Alaskan Way Viaduct and Battery Street Tunnel, Seattle, King County, W...

Significance: The Alaskan Way Viaduct is significant for its double-deck configuration, the first such bridge built in the state of Washington. The structure encompasses two different designs and crosses over ... More

Alaskan Way Viaduct and Battery Street Tunnel, Seattle, King County, WA

Alaskan Way Viaduct and Battery Street Tunnel, Seattle, King County, W...

Significance: The Alaskan Way Viaduct is significant for its double-deck configuration, the first such bridge built in the state of Washington. The structure encompasses two different designs and crosses over ... More

Alaskan Way Viaduct and Battery Street Tunnel, Seattle, King County, WA

Alaskan Way Viaduct and Battery Street Tunnel, Seattle, King County, W...

Significance: The Alaskan Way Viaduct is significant for its double-deck configuration, the first such bridge built in the state of Washington. The structure encompasses two different designs and crosses over ... More

Alaskan Way Viaduct and Battery Street Tunnel, Seattle, King County, WA

Alaskan Way Viaduct and Battery Street Tunnel, Seattle, King County, W...

Significance: The Alaskan Way Viaduct is significant for its double-deck configuration, the first such bridge built in the state of Washington. The structure encompasses two different designs and crosses over ... More

Alaskan Way Viaduct and Battery Street Tunnel, Seattle, King County, WA

Alaskan Way Viaduct and Battery Street Tunnel, Seattle, King County, W...

Significance: The Alaskan Way Viaduct is significant for its double-deck configuration, the first such bridge built in the state of Washington. The structure encompasses two different designs and crosses over ... More

Sinking last tubular section, Detroit River tunnel

Sinking last tubular section, Detroit River tunnel

Picryl description: Public domain image of a historic building in Detroit, Michigan, free to use, no copyright restrictions.

What happened in the tunnel /  - movie film screenshot

What happened in the tunnel / - movie film screenshot

"Interior of railroad coach. Pretty young lady and colored maid occupying seat. Young man in rear seat tries to attract young lady's attention. She drops her handkerchief. Young man picks it up and hands it to ... More

[Detroit River tunnel, Detroit, Mich.]

[Detroit River tunnel, Detroit, Mich.]

Public domain photograph of the train tunnel, railroad, train track, free to use, no copyright restrictions image - Picryl description

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