Abandoned power station once home to a squatter community, now being developed into an arts center.

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

The original toys that inspired the beloved children's stories are on display at the New York Public Library.

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

Home to the infamous "Typhoid Mary" and the worst loss of life in New York's history prior to September 11, 2001.

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

From scholastic to sepulchral - now under reconstruction.

A natural gas leak provides a flickering flame beneath a waterfall.

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

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.

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.

New York City's smallest piece of private property.

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

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

Collapsing castle on the Hudson river was once the storage site of military surplus business.

The feral felines of Roosevelt Island have a small army of allies and an abandoned hospital all to themselves.

A semi-scholarly approach to sex.

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

Tucked in the back of this amazing antique store is an important piece of medical history.

A crumbling hospital from the 1850s on Roosevelt Island.

A terrific purveyor of natural history objects and curios.

People escaping slavery may have hidden inside a corpse vault.

The first purpose-built art gallery in the United States is once again open as a center of craft arts.