This free, take-a-book shop seems like a trick but isn't.

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

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

The famous abolitionist’s preserved estate is one of Washington's finest monuments to its great Black citizens.

The walls of the iconic dome are hollow and have a secret stairway.

Rumor has it the uncarved lump behind the three famous suffragists is reserved for the first woman president.

Senators used to relax in the nearly forgotten marble tubs now hidden in the U.S. Capitol Building's basement.

A diminutive memorial marks the site of a successful assassination by a right-wing death squad in America's capital.

People escaping slavery may have hidden inside a corpse vault.

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

There's a crumbling old mansion inside the Smithsonian National Zoo.

These recently uncovered walls are all that's left of Washington, D.C's first defense contractor.

This leafy estate is worth $18 million and is so grand it has two mailing addresses.

The span is crooked and made from two older recycled bridges.

The longest escalator in the Western Hemisphere takes over three minutes to ride down.

A toxic ghost town sitting atop a massive coal fire.

Hellam Township is reputed to feature seven remote gates, which when passed through in the right order, open an entrance to hell.

Eighteen miniature death-scene dioramas.

The remains of a failed attempt at medieval nerdery are hidden deep in the woods of Virginia.

This abandoned amusement park was built on a site with a dark history.

A cement mixer-turned-kaleidoscope in downtown Norfolk offers different views of the city.

Scenic mount trashmore, Virginia Beach's most curious waterfront still has a couple of secrets.

The home of pigs, snakes, chameleons, and the alleged largest bunny in the United States.

America's first public mental health facility.