Ruins in Maryland

The ruins of an 18th-century mansion that was once named "Mistake" by the man who had it built.

The ruins of an old mill lie in a small ravine along a hiking trail near Little Seneca Creek.

The hidden ruins of a mill that is linked to an attempt to assassinate the vice president of the United States.

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

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

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

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

Remnants of a storybook amusement park hidden behind a strip mall.

The haunting "Hell House Altar" is one of the few remnants of an abandoned college that has been a magnet for local legends.