A small 19th-century graveyard tucked away in the middle of a suburban neighborhood.

An allegorical sculpture in Maryland wears the artist’s politics on its trunk.

The wooded estate of the Forest Service employee responsible for D.C.’s cherry blossom trees.

This ruined quarry once produced the distinctive red sandstone used for construction projects in Washington, D.C.

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

The world's oldest continuously operating airport was founded by the Wright Brothers.

An eerie, abandoned military base engulfed by nature and graffiti is now home to a local park.

The stone marker that Mason and Dixon placed at the eastern end of the famous north-south border they surveyed.

The antique hotel still has a jail in the basement, though the cockfighting ring is long gone.

Remains of a historic fountain that was mysteriously lost in the demolition of a D.C. traffic circle.

This one-room cabin where the young colonel slept during the French and Indian War.

Two dozen pinball games hidden away inside a most unlikely location.

A remarkable time capsule of American manufacturing deep in Maryland coal country.

This fort down the Potomac from Washington, D.C. was once the only defensive fort protecting the capital.

A haunting exhibit in a wildlife refuge center highlights threatened species and the conservation efforts needed to save them.

This former asylum for Black Americans is haunted by its history of violence and racism.

This scenic Maryland park was the site of one of the worst prison camps of the Civil War.

The final resting place of the tragic king and queen of the Jazz Age is tucked away in a small Maryland graveyard.

An FDR-era tuberculosis sanatorium has stood abandoned in the suburbs of the U.S. capital for over 30 years.

This dig site outside D.C. is known for its exceptionally high density of baby dinosaur fossils and dinosaur eggs.

Once home to seven different roller coasters, Glen Echo has undergone many transformations since its founding in 1891.

The ruins of this long-abandoned unsuccessful gold mine can still be found.

An intricately designed junk art house with four extravagant junk art cars hidden in the suburbs.

An eerie, decaying ghost town destined to fade into the forest.