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

The unique traffic pattern named for an influential urban planner is also known as the Pedestrian Scramble.

The house where John Wilkes Booth conspired with his co-conspirators.

This little brick tunnel built by Confederate forces was used to conduct surprise attacks on the railroad.

Remnants of a wall built to separate Black residents of Hall's Hill from a newly built subdivision are a grim reminder of segregation in 20th-century Virginia.

A whopping 14,000 copper coins cover this miniature fighter jet.

This pharmacist and his patient greet visitors to the National Community Pharmacists Association.

This rare triple-jurisdiction drawbridge passes through Virginia, Maryland, and Washington, D.C.

This brick-lined pedestrian walkway was once a railway tunnel used during the Civil War.

With over 100 jam-packed rooms to explore plus elaborate tea services and events, the Mansion on O Street is a hidden treasure.

Long-abandoned trolley tunnels just a mile away from the White House are turning into an art space.

The historic home of an educator, abolitionist, activist, and poet.

The monument's pointy aluminum tip has been melted down by repeated lightning strikes.

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

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

One of the only memorials dedicated to journalists who died in combat.

The 5.5-mile ring of steel posts around the Capitol Building is one of the largest (and most uniform) of its kind in the world.

The first memorial dedicated solely to the Black troops who fought for the Union.

The world's oldest soul food restaurant is also one of its best.

Cold War intelligence agents monitored communist embassies from an attic in a former pigeon coop.

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

The site of the climactic scene from the classic horror film is now a historic landmark.

Largest Roman Catholic church in North America.

One of the dwarven trees dates back to 1625 and survived the Hiroshima bombing.