Hidden in the hills of Western Pennsylvania lies one of the best-kept ghost towns in America that you can legally visit.

This bizarre hotel on historic Route 66 has been plagued by rumors of paranormal activity.

This New York holdover was built to provide housing for shopgirls and still does not allow men above the lobby.

This recipe is set in stone.

The world’s largest collection of Tiffany glass sits in a warehouse in Queens.

A hidden architectural treasure in New York's Brooklyn.

19th century cemetery hidden in Brooklyn's Prospect Park.

A way to take your secrets to someone else's grave.

There’s a secret bunker inside the Brooklyn Bridge, but the city won’t say where.

Relics given to a Manhattan church to avoid seizure by the Italian government.

The first museum in the United States dedicated entirely to posters.

This subterranean oyster house has been the pearl of Grand Central Station since 1913.

A hidden "place of interment for gentlemen."

A Victorian cemetery in the heart of Brooklyn remains a popular mecca of morbid curiosity.

A charming "tea atelier" hidden away in Greenpoint, Brooklyn.

This Wall Street bar was once a hub of revolutionary activity where Washington famously bid farewell to his troops.

The loneliest island in New York.

Great place to have a drink and a bite to eat in an atmosphere laden with New York's Bohemian past.

This ruined fort hidden at the top of Central Park can't seem to keep from losing its historical plaques.

Tucked in a nondescript downtown Brooklyn mall is a bar containing a remarkable turn of the century anatomical wax collection last seen in 1920s Berlin.

Nondescript elevator doors open to reveal a stunning, surreal world.

A very classy 1920s-era bar right in Grand Central Station.

A hands-on traveling collection of the innovative devices of yesteryear.

A New York garbage depot holds a secret collection of weird and wonderful refuse.