The former home of the woman who successfully fought to integrate restaurants in Washington, D.C.

An Industrial Revolution-era public work that purified water using nothing but sand.

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

A girls' boarding school inspired by the Chicago World's Fair, once abandoned, now restored to strange and scenic glory.

This forgotten building was one of the few Philadelphia-area breweries to survive Prohibition.

The abandoned coal loading dock is a canvas for unsanctioned art.

This empty Victorian manse on Staten Island is said to be haunted but is actually a real life crime scene.

Final resting place of two dozen New York City harbor ships.

This forgotten graveyard in rural New York State once served a pioneering hospital.

A formerly abandoned mental institute, now back in business.

All that remains of a magnate's dream home is a historic gate and an abandoned public pool.

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

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

The tallest The Church of Jesus Christ of Latter-day Saints temple in the world soars above the Beltway.

This abandoned sea fort has become an accidental bird sanctuary.

Ship skeletons haunt Baltimore's waterways.

A recently abandoned psych ward at the end of Sanatorium Road.

This abandoned subway station can still be seen on regular commuter trips.

An abandoned stretch of highway, deteriorating next to the operational one.