An old train trestle re-imagined as an Egyptian obelisk.

The only tennis court that falls under the jurisdiction of the central bank.

A three-story tower of books about Abraham Lincoln is one of the more unusual monuments to the president.

Perhaps the most scandalous statue of America's first president.

A heroic pigeon that, through a barrage of gunfire, delivered a message that saved over 100 lives in World War I.

This taxidermy horse was a Civil War hero.

The most decorated dog of World War I is preserved in the Smithsonian.

The remains of Martha, the last known passenger pigeon, serve as a tool to educate about conservation.

One of the most influential presidents in U.S. history wanted only this plain, elegant monument as his lasting memorial.

Built to defend Washington D.C. during the Civil War, this fort became a post-war nucleus for a thriving Black community.

This shale formation along the Appalachian Trail once inspired the third president of the United States.

Built in the 1850s, this church was of the first five churches constructed in Harper's Ferry.

Time travel with sweets across history at this research-based candy store.

The last holdout of a pre-Civil War rebel who took the matter of slavery into his own hands.

This advertisement for talcum powder was painted on the rock face and has since defied removal.

Before Metro, Washington had a robust streetcar network—and you see the remains of this infrastructure if you know where to look.

A small token of gratitude from freezing cold journalists who were given a warm haven while covering JFK's inauguration.

This stately mansion, built in 1787 by America's first Secretary of the Navy, is rumored to be one of the most haunted buildings in Washington, DC.

‘Bush the old fire dog died of poison July 5th, 1869. RIP.’

The early data processor factory founded in Washington for the 1890 U.S. Census went on to become IBM.

The oldest building in the District of Columbia was preserved because of a mistaken connection to George Washington.

An overlooked tribute to one of the most important peace deals in American history.

Before Nixon, "watergate" meant canals.

The word "Watergate" will forever be associated with the infamous scandal in 1972, but this fountain is famous in its own right.