A beautiful and abandoned New York subway station from 1904, complete with chandelier.

This little-known Revolutionary War fort is supposedly haunted by the ghosts of its past.

A museum dedicated to the strange and extravagant costumes and memorabilia of the mummers, a tradition older than Philadelphia itself.

Where America's first doomsday cult awaited the end of the world.

A layered tribute to the work of mosaicist Isaiah Zagar.

An abandoned cemetery lies in ruins as the surrounding forest swallows it whole.

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

Four bald cypress trees in Lafayette Square, across from the White House, mark the southern edge of a 100,000 year old cypress swamp.

A Spiritualist house of worship where believers communicate with the dead in the spirit world.

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

A wondrous old library overlooking the nation's capital.

Franciscan monks created a facsimile of the Holy Land for North Americans who couldn’t afford the trip overseas.

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