Significance: One of the last remaining examples of Potomac River Lighthouse architecture. Built in 1855 and used until 1926, the lighthouse was placed near number 1 boundary marker for the District of Columbia More
Significance: One of the last remaining examples of Potomac River Lighthouse architecture. Built in 1855 and used until 1926, the lighthouse was placed near number 1 boundary marker for the District of Columbia More
Significance: One of the last remaining examples of Potomac River Lighthouse architecture. Built in 1855 and used until 1926, the lighthouse was placed near number 1 boundary marker for the District of Columbia More
Significance: One of the last remaining examples of Potomac River Lighthouse architecture. Built in 1855 and used until 1926, the lighthouse was placed near number 1 boundary marker for the District of Columbia More
Significance: One of the last remaining examples of Potomac River Lighthouse architecture. Built in 1855 and used until 1926, the lighthouse was placed near number 1 boundary marker for the District of Columbia More
Significance: One of the last remaining examples of Potomac River Lighthouse architecture. Built in 1855 and used until 1926, the lighthouse was placed near number 1 boundary marker for the District of Columbia More
Significance: One of the last remaining examples of Potomac River Lighthouse architecture. Built in 1855 and used until 1926, the lighthouse was placed near number 1 boundary marker for the District of Columbia More
Significance: One of the last remaining examples of Potomac River Lighthouse architecture. Built in 1855 and used until 1926, the lighthouse was placed near number 1 boundary marker for the District of Columbia More
Significance: One of the last remaining examples of Potomac River Lighthouse architecture. Built in 1855 and used until 1926, the lighthouse was placed near number 1 boundary marker for the District of Columbia More
Significance: One of the last remaining examples of Potomac River Lighthouse architecture. Built in 1855 and used until 1926, the lighthouse was placed near number 1 boundary marker for the District of Columbia More
Significance: One of the last remaining examples of Potomac River Lighthouse architecture. Built in 1855 and used until 1926, the lighthouse was placed near number 1 boundary marker for the District of Columbia More
Significance: One of the last remaining examples of Potomac River Lighthouse architecture. Built in 1855 and used until 1926, the lighthouse was placed near number 1 boundary marker for the District of Columbia More
Significance: One of the last remaining examples of Potomac River Lighthouse architecture. Built in 1855 and used until 1926, the lighthouse was placed near number 1 boundary marker for the District of Columbia More
Significance: The Timothy Caldwell house was begun in 1802 and has been continuously well maintained ever since. It was the Executive Mansion during the first months of James Monroe's Presidency, and is now co More
Significance: The Timothy Caldwell house was begun in 1802 and has been continuously well maintained ever since. It was the Executive Mansion during the first months of James Monroe's Presidency, and is now co More
Significance: The Timothy Caldwell house was begun in 1802 and has been continuously well maintained ever since. It was the Executive Mansion during the first months of James Monroe's Presidency, and is now co More
Significance: The Timothy Caldwell house was begun in 1802 and has been continuously well maintained ever since. It was the Executive Mansion during the first months of James Monroe's Presidency, and is now co More
Significance: The Timothy Caldwell house was begun in 1802 and has been continuously well maintained ever since. It was the Executive Mansion during the first months of James Monroe's Presidency, and is now co More
Significance: The Timothy Caldwell house was begun in 1802 and has been continuously well maintained ever since. It was the Executive Mansion during the first months of James Monroe's Presidency, and is now co More
Significance: The Timothy Caldwell house was begun in 1802 and has been continuously well maintained ever since. It was the Executive Mansion during the first months of James Monroe's Presidency, and is now co More
Significance: The Timothy Caldwell house was begun in 1802 and has been continuously well maintained ever since. It was the Executive Mansion during the first months of James Monroe's Presidency, and is now co More
Significance: The Timothy Caldwell house was begun in 1802 and has been continuously well maintained ever since. It was the Executive Mansion during the first months of James Monroe's Presidency, and is now co More
Significance: The Timothy Caldwell house was begun in 1802 and has been continuously well maintained ever since. It was the Executive Mansion during the first months of James Monroe's Presidency, and is now co More
Significance: The Timothy Caldwell house was begun in 1802 and has been continuously well maintained ever since. It was the Executive Mansion during the first months of James Monroe's Presidency, and is now co More
Significance: The Timothy Caldwell house was begun in 1802 and has been continuously well maintained ever since. It was the Executive Mansion during the first months of James Monroe's Presidency, and is now co More
Significance: The Timothy Caldwell house was begun in 1802 and has been continuously well maintained ever since. It was the Executive Mansion during the first months of James Monroe's Presidency, and is now co More
Significance: The Timothy Caldwell house was begun in 1802 and has been continuously well maintained ever since. It was the Executive Mansion during the first months of James Monroe's Presidency, and is now co More
Significance: The Timothy Caldwell house was begun in 1802 and has been continuously well maintained ever since. It was the Executive Mansion during the first months of James Monroe's Presidency, and is now co More
Significance: The Timothy Caldwell house was begun in 1802 and has been continuously well maintained ever since. It was the Executive Mansion during the first months of James Monroe's Presidency, and is now co More
Significance: The Timothy Caldwell house was begun in 1802 and has been continuously well maintained ever since. It was the Executive Mansion during the first months of James Monroe's Presidency, and is now co More
Significance: The Timothy Caldwell house was begun in 1802 and has been continuously well maintained ever since. It was the Executive Mansion during the first months of James Monroe's Presidency, and is now co More
Significance: The Timothy Caldwell house was begun in 1802 and has been continuously well maintained ever since. It was the Executive Mansion during the first months of James Monroe's Presidency, and is now co More
Significance: The Timothy Caldwell house was begun in 1802 and has been continuously well maintained ever since. It was the Executive Mansion during the first months of James Monroe's Presidency, and is now co More
Significance: The Timothy Caldwell house was begun in 1802 and has been continuously well maintained ever since. It was the Executive Mansion during the first months of James Monroe's Presidency, and is now co More
Significance: The Timothy Caldwell house was begun in 1802 and has been continuously well maintained ever since. It was the Executive Mansion during the first months of James Monroe's Presidency, and is now co More
Significance: The Timothy Caldwell house was begun in 1802 and has been continuously well maintained ever since. It was the Executive Mansion during the first months of James Monroe's Presidency, and is now co More
Significance: The Timothy Caldwell house was begun in 1802 and has been continuously well maintained ever since. It was the Executive Mansion during the first months of James Monroe's Presidency, and is now co More
Significance: The Timothy Caldwell house was begun in 1802 and has been continuously well maintained ever since. It was the Executive Mansion during the first months of James Monroe's Presidency, and is now co More