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

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

A Civil War fort in the middle of Washington, D.C. has been swallowed by a forest.

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

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

This abandoned asylum was once a state of the art facility before devolving into one of the most deadly mental institutions in American history.

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

This abandoned sea fort has become an accidental bird sanctuary.

Ship skeletons haunt Baltimore's waterways.