In upstate New York, gorgeous waterfalls and a watermill are slowly being reclaimed by nature.

The oldest living tree in Manhattan comes shrouded in sinister legend.

An artist's cute bronze subway sculptures belie his violent artistic past.

This innocent-looking townhome is actually a subway exit.

Hordes of precariously balanced stone figures crowd the shores of the Hudson River.

A WWI fighter plane and turn-of-the-century penny candy shop are among the unexpected features of this Financial District building.

An abandoned asylum where patients have been forgotten but their possessions remain.

The remnants of two World's Fairs are here, complete with a 12-story globe, a mini-Manhattan, and a UFO-shaped pavilion.

A once grand hotel is being retaken by the wilderness it once capitalized on.

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

Read between the lines of the subway map to find the hidden abandoned Civil War fort.

Tucked away amidst some of the most famous addresses in the world is New York's only fraction of a street.

A restaurant on Staten Island showcases a different grandmother’s cooking every night.

The haunting, dilapidated remains of a former poorhouse on Staten Island's Greenbelt.

The abandoned husk of a mental institution that failed to save a Jazz Age icon still sits nearly unchanged.

An abandoned castle owned and ignored by Masons carries a cursed history.

This unmarked and unloved Manhattan subway grate created one of the most iconic images in American cinema.

The name of this famed hospital was once a byword for the horrors of medical and psychiatric care.

A stunning, two-tiered waterfall made famous by poets, artists and the legend of a ghost dog.

A hip bar decorated with walls of golden skulls.

The world’s oldest and biggest bookstore stocking only mystery, crime fiction, espionage, and thrillers.

This abandoned subway station beneath the Waldorf-Astoria hotel is allegedly used to secretly transport presidents.

Dodge prohibitionists and slide through the telephone booth in Crif Dogs.

This beautiful building in the heart of Manhattan's Financial District was empty for decades.