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

In the woods of New Jersey lie the ruins of a munitions village abandoned after World War I and the remnants of a 1920s wooden racetrack.

This historic iron-working village is now a ghost town so immaculate that it looks as though it was recently built.

Built in the 1920s, this co-op in the Bronx feels more like an Italian villa than a typical New York apartment building.

This landmark building is now a vibrant performing arts space with musical acts from around the world.

This eclectic sculpture garden in Brooklyn, home to a bizarre collection of art, was once a run-down junkyard.

A temple belonging to the largest Buddhist order in South Korea nestled in the middle of New York City.

Magnificent New Deal Murals evoke a time when New York City harbor was one of the world's greatest and busiest ports.

On the hills of Bay Ridge stands a house straight out of a fairy tale.

A mysterious statue of a leather jacket-clad rebel leans coolly on an odd yellow clock.

This old estate is a remnant of when the Bronx was a popular summer destination for wealthy New Yorkers.

The smallest island in Manhattan is a manmade landfill dominated by a Buddhist peace arch.

This striking arch, one of the first architectural elements constructed in Prospect Park, was recently restored to its original glory.

The oldest living organism in New York City. Maybe.

Twice a day one of these tragic bronze mariners drowns with the tide to remember all those the sea has taken.

This seemingly unremarkable boulder is said to bear the hoofprint of the devil himself.

Two community gardens under the elevated subway lines on a very busy commercial strip in Bushwick.

This giant boulder is sandwiched between apartment complexes in upper Manhattan.

This slender three-story building has also had several famous residents.

There are owls with glowing eyes in Herald Square.

This mysterious marker puzzles pedestrians and infuriates geographers.

A crumbling staircase in upper Manhattan is all that remains of one of the most important sites in sports history.

Play heads or tails with thousands of different coins.

The front yard of an Upper East Side town house hides the last fragment of one of New York's most famous theatres.