Hawaii Volcanoes National Park Roads, Volcano, Hawaii County, HI
See Thurston Lava Tube, HALS HI-6, for additional documentation. Significance: The Hawaii Volcanoes National Park road system provides access to active volcanoes and related landscapes along with varied ecosyst... More
Hawaii Volcanoes National Park Roads, Volcano, Hawaii County, HI
See Thurston Lava Tube, HALS HI-6, for additional documentation. Significance: The Hawaii Volcanoes National Park road system provides access to active volcanoes and related landscapes along with varied ecosyst... More
Wawona Road, Between South Entrance & Yosemite Valley, Yosemite Villag...
Significance: The most successful of the Yosemite toll roads, the Wawona Road remains the chief entrance road to the park from southern California. Unprocessed Field note material exists for this structure: N8... More
Wawona Road, Between South Entrance & Yosemite Valley, Yosemite Villag...
Significance: The most successful of the Yosemite toll roads, the Wawona Road remains the chief entrance road to the park from southern California. Unprocessed Field note material exists for this structure: N8... More
Wawona Road, Between South Entrance & Yosemite Valley, Yosemite Villag...
Significance: The most successful of the Yosemite toll roads, the Wawona Road remains the chief entrance road to the park from southern California. Unprocessed Field note material exists for this structure: N8... More
Mount Rainier National Park Roads & Bridges, Longmire, Pierce County, ...
Significance: The Mount Rainier National Park road system reflects its evolution from a primitive road providing access to Paradise Valley into a modern system of scenic highways and lesser access roads. The f... More
Going-to-the-Sun Road, West Glacier, Flathead County, MT
Significance: Going-to-the-Sun Road is a 51-mile stretch of scenic mountain road in Glacier National Park. The road is significant as a unique engineering accomplishment of the early twentieth century, in that... More
Going-to-the-Sun Road, West Glacier, Flathead County, MT
Significance: Going-to-the-Sun Road is a 51-mile stretch of scenic mountain road in Glacier National Park. The road is significant as a unique engineering accomplishment of the early twentieth century, in that... More
Going-to-the-Sun Road, West Glacier, Flathead County, MT
Significance: Going-to-the-Sun Road is a 51-mile stretch of scenic mountain road in Glacier National Park. The road is significant as a unique engineering accomplishment of the early twentieth century, in that... More
Going-to-the-Sun Road, West Glacier, Flathead County, MT
Significance: Going-to-the-Sun Road is a 51-mile stretch of scenic mountain road in Glacier National Park. The road is significant as a unique engineering accomplishment of the early twentieth century, in that... More
Going-to-the-Sun Road, West Glacier, Flathead County, MT
Significance: Going-to-the-Sun Road is a 51-mile stretch of scenic mountain road in Glacier National Park. The road is significant as a unique engineering accomplishment of the early twentieth century, in that... More
Glacier Point Road, Between Chinquapin Flat & Glacier Point, Yosemite ...
Significance: The Glacier Point Road is a scenic drive providing access to Yosemite's most popular overlook. The road was opened as a toll wagon road in the 1870s, and reconstructed as a modern highway in the ... More
West Rim Drive, Between Grand Canyon Village & Hermit Rest, Grand Cany...
Significance: The scenic drive is an early example of the cooperative agreement between the National Park Service and Bureau of Public Roads (then part of the Department of Agriculture) to build quality automot... More
West Rim Drive, Between Grand Canyon Village & Hermit Rest, Grand Cany...
Significance: The scenic drive is an early example of the cooperative agreement between the National Park Service and Bureau of Public Roads (then part of the Department of Agriculture) to build quality automot... More
Wawona Road, Between South Entrance & Yosemite Valley, Yosemite Villag...
Significance: The most successful of the Yosemite toll roads, the Wawona Road remains the chief entrance road to the park from southern California. Unprocessed Field note material exists for this structure: N8... More
Going-to-the-Sun Road, West Glacier, Flathead County, MT
Significance: Going-to-the-Sun Road is a 51-mile stretch of scenic mountain road in Glacier National Park. The road is significant as a unique engineering accomplishment of the early twentieth century, in that... More
Going-to-the-Sun Road, West Glacier, Flathead County, MT
Significance: Going-to-the-Sun Road is a 51-mile stretch of scenic mountain road in Glacier National Park. The road is significant as a unique engineering accomplishment of the early twentieth century, in that... More
Going-to-the-Sun Road, West Glacier, Flathead County, MT
Significance: Going-to-the-Sun Road is a 51-mile stretch of scenic mountain road in Glacier National Park. The road is significant as a unique engineering accomplishment of the early twentieth century, in that... More
Going-to-the-Sun Road, West Glacier, Flathead County, MT
Significance: Going-to-the-Sun Road is a 51-mile stretch of scenic mountain road in Glacier National Park. The road is significant as a unique engineering accomplishment of the early twentieth century, in that... More
Going-to-the-Sun Road, West Glacier, Flathead County, MT
Significance: Going-to-the-Sun Road is a 51-mile stretch of scenic mountain road in Glacier National Park. The road is significant as a unique engineering accomplishment of the early twentieth century, in that... More
Going-to-the-Sun Road, West Glacier, Flathead County, MT
Significance: Going-to-the-Sun Road is a 51-mile stretch of scenic mountain road in Glacier National Park. The road is significant as a unique engineering accomplishment of the early twentieth century, in that... More
Glacier Point Road, Between Chinquapin Flat & Glacier Point, Yosemite ...
Significance: The Glacier Point Road is a scenic drive providing access to Yosemite's most popular overlook. The road was opened as a toll wagon road in the 1870s, and reconstructed as a modern highway in the ... More
West Rim Drive, Between Grand Canyon Village & Hermit Rest, Grand Cany...
Significance: The scenic drive is an early example of the cooperative agreement between the National Park Service and Bureau of Public Roads (then part of the Department of Agriculture) to build quality automot... More
West Rim Drive, Between Grand Canyon Village & Hermit Rest, Grand Cany...
Significance: The scenic drive is an early example of the cooperative agreement between the National Park Service and Bureau of Public Roads (then part of the Department of Agriculture) to build quality automot... More
Big Oak Flat Road, Between Big Oak Flat Entrance & Merced River, Yosem...
Significance: The second road to reach Yosemite Valley, the Big Oak Flat Road is significant for associations with early Yosemite transportation. Unprocessed Field note material exists for this structure: N838... More
Big Oak Flat Road, Between Big Oak Flat Entrance & Merced River, Yosem...
Significance: The second road to reach Yosemite Valley, the Big Oak Flat Road is significant for associations with early Yosemite transportation. Unprocessed Field note material exists for this structure: N838... More
Big Oak Flat Road, Between Big Oak Flat Entrance & Merced River, Yosem...
Significance: The second road to reach Yosemite Valley, the Big Oak Flat Road is significant for associations with early Yosemite transportation. Unprocessed Field note material exists for this structure: N838... More
Hawaii Volcanoes National Park Roads, Volcano, Hawaii County, HI
See Thurston Lava Tube, HALS HI-6, for additional documentation. Significance: The Hawaii Volcanoes National Park road system provides access to active volcanoes and related landscapes along with varied ecosyst... More
Hawaii Volcanoes National Park Roads, Volcano, Hawaii County, HI
See Thurston Lava Tube, HALS HI-6, for additional documentation. Significance: The Hawaii Volcanoes National Park road system provides access to active volcanoes and related landscapes along with varied ecosyst... More
Hawaii Volcanoes National Park Roads, Volcano, Hawaii County, HI
See Thurston Lava Tube, HALS HI-6, for additional documentation. Significance: The Hawaii Volcanoes National Park road system provides access to active volcanoes and related landscapes along with varied ecosyst... More
Hawaii Volcanoes National Park Roads, Volcano, Hawaii County, HI
See Thurston Lava Tube, HALS HI-6, for additional documentation. Significance: The Hawaii Volcanoes National Park road system provides access to active volcanoes and related landscapes along with varied ecosyst... More
Wawona Road, Between South Entrance & Yosemite Valley, Yosemite Villag...
Significance: The most successful of the Yosemite toll roads, the Wawona Road remains the chief entrance road to the park from southern California. Unprocessed Field note material exists for this structure: N8... More
Wawona Road, Between South Entrance & Yosemite Valley, Yosemite Villag...
Significance: The most successful of the Yosemite toll roads, the Wawona Road remains the chief entrance road to the park from southern California. Unprocessed Field note material exists for this structure: N8... More
Going-to-the-Sun Road, West Glacier, Flathead County, MT
Significance: Going-to-the-Sun Road is a 51-mile stretch of scenic mountain road in Glacier National Park. The road is significant as a unique engineering accomplishment of the early twentieth century, in that... More
Going-to-the-Sun Road, West Glacier, Flathead County, MT
Significance: Going-to-the-Sun Road is a 51-mile stretch of scenic mountain road in Glacier National Park. The road is significant as a unique engineering accomplishment of the early twentieth century, in that... More
Going-to-the-Sun Road, West Glacier, Flathead County, MT
Significance: Going-to-the-Sun Road is a 51-mile stretch of scenic mountain road in Glacier National Park. The road is significant as a unique engineering accomplishment of the early twentieth century, in that... More
Going-to-the-Sun Road, West Glacier, Flathead County, MT
Significance: Going-to-the-Sun Road is a 51-mile stretch of scenic mountain road in Glacier National Park. The road is significant as a unique engineering accomplishment of the early twentieth century, in that... More
Going-to-the-Sun Road, West Glacier, Flathead County, MT
Significance: Going-to-the-Sun Road is a 51-mile stretch of scenic mountain road in Glacier National Park. The road is significant as a unique engineering accomplishment of the early twentieth century, in that... More
Going-to-the-Sun Road, West Glacier, Flathead County, MT
Significance: Going-to-the-Sun Road is a 51-mile stretch of scenic mountain road in Glacier National Park. The road is significant as a unique engineering accomplishment of the early twentieth century, in that... More
Going-to-the-Sun Road, West Glacier, Flathead County, MT
Significance: Going-to-the-Sun Road is a 51-mile stretch of scenic mountain road in Glacier National Park. The road is significant as a unique engineering accomplishment of the early twentieth century, in that... More
Glacier Point Road, Between Chinquapin Flat & Glacier Point, Yosemite ...
Significance: The Glacier Point Road is a scenic drive providing access to Yosemite's most popular overlook. The road was opened as a toll wagon road in the 1870s, and reconstructed as a modern highway in the ... More
Wawona Road, Between South Entrance & Yosemite Valley, Yosemite Villag...
Significance: The most successful of the Yosemite toll roads, the Wawona Road remains the chief entrance road to the park from southern California. Unprocessed Field note material exists for this structure: N8... More
Wawona Road, Between South Entrance & Yosemite Valley, Yosemite Villag...
Significance: The most successful of the Yosemite toll roads, the Wawona Road remains the chief entrance road to the park from southern California. Unprocessed Field note material exists for this structure: N8... More
Wawona Road, Between South Entrance & Yosemite Valley, Yosemite Villag...
Significance: The most successful of the Yosemite toll roads, the Wawona Road remains the chief entrance road to the park from southern California. Unprocessed Field note material exists for this structure: N8... More
Wawona Road, Between South Entrance & Yosemite Valley, Yosemite Villag...
Significance: The most successful of the Yosemite toll roads, the Wawona Road remains the chief entrance road to the park from southern California. Unprocessed Field note material exists for this structure: N8... More
Wawona Road, Between South Entrance & Yosemite Valley, Yosemite Villag...
Significance: The most successful of the Yosemite toll roads, the Wawona Road remains the chief entrance road to the park from southern California. Unprocessed Field note material exists for this structure: N8... More
Going-to-the-Sun Road, West Glacier, Flathead County, MT
Significance: Going-to-the-Sun Road is a 51-mile stretch of scenic mountain road in Glacier National Park. The road is significant as a unique engineering accomplishment of the early twentieth century, in that... More
Going-to-the-Sun Road, West Glacier, Flathead County, MT
Significance: Going-to-the-Sun Road is a 51-mile stretch of scenic mountain road in Glacier National Park. The road is significant as a unique engineering accomplishment of the early twentieth century, in that... More
Going-to-the-Sun Road, West Glacier, Flathead County, MT
Significance: Going-to-the-Sun Road is a 51-mile stretch of scenic mountain road in Glacier National Park. The road is significant as a unique engineering accomplishment of the early twentieth century, in that... More
Going-to-the-Sun Road, West Glacier, Flathead County, MT
Significance: Going-to-the-Sun Road is a 51-mile stretch of scenic mountain road in Glacier National Park. The road is significant as a unique engineering accomplishment of the early twentieth century, in that... More
Going-to-the-Sun Road, West Glacier, Flathead County, MT
Significance: Going-to-the-Sun Road is a 51-mile stretch of scenic mountain road in Glacier National Park. The road is significant as a unique engineering accomplishment of the early twentieth century, in that... More
Going-to-the-Sun Road, West Glacier, Flathead County, MT
Significance: Going-to-the-Sun Road is a 51-mile stretch of scenic mountain road in Glacier National Park. The road is significant as a unique engineering accomplishment of the early twentieth century, in that... More
West Rim Drive, Between Grand Canyon Village & Hermit Rest, Grand Cany...
Significance: The scenic drive is an early example of the cooperative agreement between the National Park Service and Bureau of Public Roads (then part of the Department of Agriculture) to build quality automot... More
West Rim Drive, Between Grand Canyon Village & Hermit Rest, Grand Cany...
Significance: The scenic drive is an early example of the cooperative agreement between the National Park Service and Bureau of Public Roads (then part of the Department of Agriculture) to build quality automot... More
Big Oak Flat Road, Between Big Oak Flat Entrance & Merced River, Yosem...
Significance: The second road to reach Yosemite Valley, the Big Oak Flat Road is significant for associations with early Yosemite transportation. Unprocessed Field note material exists for this structure: N838... More
Big Oak Flat Road, Between Big Oak Flat Entrance & Merced River, Yosem...
Significance: The second road to reach Yosemite Valley, the Big Oak Flat Road is significant for associations with early Yosemite transportation. Unprocessed Field note material exists for this structure: N838... More
Big Oak Flat Road, Between Big Oak Flat Entrance & Merced River, Yosem...
Significance: The second road to reach Yosemite Valley, the Big Oak Flat Road is significant for associations with early Yosemite transportation. Unprocessed Field note material exists for this structure: N838... More
Hawaii Volcanoes National Park Roads, Volcano, Hawaii County, HI
See Thurston Lava Tube, HALS HI-6, for additional documentation. Significance: The Hawaii Volcanoes National Park road system provides access to active volcanoes and related landscapes along with varied ecosyst... More
Hawaii Volcanoes National Park Roads, Volcano, Hawaii County, HI
See Thurston Lava Tube, HALS HI-6, for additional documentation. Significance: The Hawaii Volcanoes National Park road system provides access to active volcanoes and related landscapes along with varied ecosyst... More
Hawaii Volcanoes National Park Roads, Volcano, Hawaii County, HI
See Thurston Lava Tube, HALS HI-6, for additional documentation. Significance: The Hawaii Volcanoes National Park road system provides access to active volcanoes and related landscapes along with varied ecosyst... More
Wawona Road, Between South Entrance & Yosemite Valley, Yosemite Villag...
Significance: The most successful of the Yosemite toll roads, the Wawona Road remains the chief entrance road to the park from southern California. Unprocessed Field note material exists for this structure: N8... More
Wawona Road, Between South Entrance & Yosemite Valley, Yosemite Villag...
Significance: The most successful of the Yosemite toll roads, the Wawona Road remains the chief entrance road to the park from southern California. Unprocessed Field note material exists for this structure: N8... More
Wawona Road, Between South Entrance & Yosemite Valley, Yosemite Villag...
Significance: The most successful of the Yosemite toll roads, the Wawona Road remains the chief entrance road to the park from southern California. Unprocessed Field note material exists for this structure: N8... More
Going-to-the-Sun Road, West Glacier, Flathead County, MT
Significance: Going-to-the-Sun Road is a 51-mile stretch of scenic mountain road in Glacier National Park. The road is significant as a unique engineering accomplishment of the early twentieth century, in that... More
Going-to-the-Sun Road, West Glacier, Flathead County, MT
Significance: Going-to-the-Sun Road is a 51-mile stretch of scenic mountain road in Glacier National Park. The road is significant as a unique engineering accomplishment of the early twentieth century, in that... More
Going-to-the-Sun Road, West Glacier, Flathead County, MT
Significance: Going-to-the-Sun Road is a 51-mile stretch of scenic mountain road in Glacier National Park. The road is significant as a unique engineering accomplishment of the early twentieth century, in that... More
Going-to-the-Sun Road, West Glacier, Flathead County, MT
Significance: Going-to-the-Sun Road is a 51-mile stretch of scenic mountain road in Glacier National Park. The road is significant as a unique engineering accomplishment of the early twentieth century, in that... More
Going-to-the-Sun Road, West Glacier, Flathead County, MT
Significance: Going-to-the-Sun Road is a 51-mile stretch of scenic mountain road in Glacier National Park. The road is significant as a unique engineering accomplishment of the early twentieth century, in that... More
Going-to-the-Sun Road, West Glacier, Flathead County, MT
Significance: Going-to-the-Sun Road is a 51-mile stretch of scenic mountain road in Glacier National Park. The road is significant as a unique engineering accomplishment of the early twentieth century, in that... More
Going-to-the-Sun Road, West Glacier, Flathead County, MT
Significance: Going-to-the-Sun Road is a 51-mile stretch of scenic mountain road in Glacier National Park. The road is significant as a unique engineering accomplishment of the early twentieth century, in that... More
Going-to-the-Sun Road, West Glacier, Flathead County, MT
Significance: Going-to-the-Sun Road is a 51-mile stretch of scenic mountain road in Glacier National Park. The road is significant as a unique engineering accomplishment of the early twentieth century, in that... More
Going-to-the-Sun Road, West Glacier, Flathead County, MT
Significance: Going-to-the-Sun Road is a 51-mile stretch of scenic mountain road in Glacier National Park. The road is significant as a unique engineering accomplishment of the early twentieth century, in that... More
West Rim Drive, Between Grand Canyon Village & Hermit Rest, Grand Cany...
Significance: The scenic drive is an early example of the cooperative agreement between the National Park Service and Bureau of Public Roads (then part of the Department of Agriculture) to build quality automot... More
West Rim Drive, Between Grand Canyon Village & Hermit Rest, Grand Cany...
Significance: The scenic drive is an early example of the cooperative agreement between the National Park Service and Bureau of Public Roads (then part of the Department of Agriculture) to build quality automot... More
West Rim Drive, Between Grand Canyon Village & Hermit Rest, Grand Cany...
Significance: The scenic drive is an early example of the cooperative agreement between the National Park Service and Bureau of Public Roads (then part of the Department of Agriculture) to build quality automot... More
Big Oak Flat Road, Between Big Oak Flat Entrance & Merced River, Yosem...
Significance: The second road to reach Yosemite Valley, the Big Oak Flat Road is significant for associations with early Yosemite transportation. Unprocessed Field note material exists for this structure: N838... More
Big Oak Flat Road, Between Big Oak Flat Entrance & Merced River, Yosem...
Significance: The second road to reach Yosemite Valley, the Big Oak Flat Road is significant for associations with early Yosemite transportation. Unprocessed Field note material exists for this structure: N838... More
Hawaii Volcanoes National Park Roads, Volcano, Hawaii County, HI
See Thurston Lava Tube, HALS HI-6, for additional documentation. Significance: The Hawaii Volcanoes National Park road system provides access to active volcanoes and related landscapes along with varied ecosyst... More
Wawona Road, Between South Entrance & Yosemite Valley, Yosemite Villag...
Significance: The most successful of the Yosemite toll roads, the Wawona Road remains the chief entrance road to the park from southern California. Unprocessed Field note material exists for this structure: N8... More
Wawona Road, Between South Entrance & Yosemite Valley, Yosemite Villag...
Significance: The most successful of the Yosemite toll roads, the Wawona Road remains the chief entrance road to the park from southern California. Unprocessed Field note material exists for this structure: N8... More
Wawona Road, Between South Entrance & Yosemite Valley, Yosemite Villag...
Significance: The most successful of the Yosemite toll roads, the Wawona Road remains the chief entrance road to the park from southern California. Unprocessed Field note material exists for this structure: N8... More
Going-to-the-Sun Road, West Glacier, Flathead County, MT
Significance: Going-to-the-Sun Road is a 51-mile stretch of scenic mountain road in Glacier National Park. The road is significant as a unique engineering accomplishment of the early twentieth century, in that... More
Going-to-the-Sun Road, West Glacier, Flathead County, MT
Significance: Going-to-the-Sun Road is a 51-mile stretch of scenic mountain road in Glacier National Park. The road is significant as a unique engineering accomplishment of the early twentieth century, in that... More
Going-to-the-Sun Road, West Glacier, Flathead County, MT
Significance: Going-to-the-Sun Road is a 51-mile stretch of scenic mountain road in Glacier National Park. The road is significant as a unique engineering accomplishment of the early twentieth century, in that... More
Going-to-the-Sun Road, West Glacier, Flathead County, MT
Significance: Going-to-the-Sun Road is a 51-mile stretch of scenic mountain road in Glacier National Park. The road is significant as a unique engineering accomplishment of the early twentieth century, in that... More
Going-to-the-Sun Road, West Glacier, Flathead County, MT
Significance: Going-to-the-Sun Road is a 51-mile stretch of scenic mountain road in Glacier National Park. The road is significant as a unique engineering accomplishment of the early twentieth century, in that... More
Going-to-the-Sun Road, West Glacier, Flathead County, MT
Significance: Going-to-the-Sun Road is a 51-mile stretch of scenic mountain road in Glacier National Park. The road is significant as a unique engineering accomplishment of the early twentieth century, in that... More
Going-to-the-Sun Road, West Glacier, Flathead County, MT
Significance: Going-to-the-Sun Road is a 51-mile stretch of scenic mountain road in Glacier National Park. The road is significant as a unique engineering accomplishment of the early twentieth century, in that... More
Going-to-the-Sun Road, West Glacier, Flathead County, MT
Significance: Going-to-the-Sun Road is a 51-mile stretch of scenic mountain road in Glacier National Park. The road is significant as a unique engineering accomplishment of the early twentieth century, in that... More
Going-to-the-Sun Road, West Glacier, Flathead County, MT
Significance: Going-to-the-Sun Road is a 51-mile stretch of scenic mountain road in Glacier National Park. The road is significant as a unique engineering accomplishment of the early twentieth century, in that... More
Going-to-the-Sun Road, West Glacier, Flathead County, MT
Significance: Going-to-the-Sun Road is a 51-mile stretch of scenic mountain road in Glacier National Park. The road is significant as a unique engineering accomplishment of the early twentieth century, in that... More
West Rim Drive, Between Grand Canyon Village & Hermit Rest, Grand Cany...
Significance: The scenic drive is an early example of the cooperative agreement between the National Park Service and Bureau of Public Roads (then part of the Department of Agriculture) to build quality automot... More
Big Oak Flat Road, Between Big Oak Flat Entrance & Merced River, Yosem...
Significance: The second road to reach Yosemite Valley, the Big Oak Flat Road is significant for associations with early Yosemite transportation. Unprocessed Field note material exists for this structure: N838... More
Big Oak Flat Road, Between Big Oak Flat Entrance & Merced River, Yosem...
Significance: The second road to reach Yosemite Valley, the Big Oak Flat Road is significant for associations with early Yosemite transportation. Unprocessed Field note material exists for this structure: N838... More
Big Oak Flat Road, Between Big Oak Flat Entrance & Merced River, Yosem...
Significance: The second road to reach Yosemite Valley, the Big Oak Flat Road is significant for associations with early Yosemite transportation. Unprocessed Field note material exists for this structure: N838... More
Hawaii Volcanoes National Park Roads, Volcano, Hawaii County, HI
See Thurston Lava Tube, HALS HI-6, for additional documentation. Significance: The Hawaii Volcanoes National Park road system provides access to active volcanoes and related landscapes along with varied ecosyst... More
Wawona Road, Between South Entrance & Yosemite Valley, Yosemite Villag...
Significance: The most successful of the Yosemite toll roads, the Wawona Road remains the chief entrance road to the park from southern California. Unprocessed Field note material exists for this structure: N8... More
Wawona Road, Between South Entrance & Yosemite Valley, Yosemite Villag...
Significance: The most successful of the Yosemite toll roads, the Wawona Road remains the chief entrance road to the park from southern California. Unprocessed Field note material exists for this structure: N8... More
Going-to-the-Sun Road, West Glacier, Flathead County, MT
Significance: Going-to-the-Sun Road is a 51-mile stretch of scenic mountain road in Glacier National Park. The road is significant as a unique engineering accomplishment of the early twentieth century, in that... More
Going-to-the-Sun Road, West Glacier, Flathead County, MT
Significance: Going-to-the-Sun Road is a 51-mile stretch of scenic mountain road in Glacier National Park. The road is significant as a unique engineering accomplishment of the early twentieth century, in that... More