A long abandoned hospital building on the outskirts of NYC.

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

Manhattan's lighthouse, erected at the insistence of the unsinkable Molly Brown.

A Manhattan courthouse hides a small but scathing memorial to Holocaust injustice.

The only home that Alexander Hamilton ever owned has a history almost as troubled as his own.

A masterpiece of LGBT art has been restored in what may now be the most valuable restroom in America.

The oldest house in Manhattan is now a museum that remembers the home's sordid history of scandals, vice-presidents, and ghosts.

A dark, dank room in subterranean Manhattan was the site of a ghastly murder.

Unlock the secrets of the conjuring arts.

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.

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

The one-stop shop for all of your superhero (or evil arch-nemesis) needs.

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

Try not to get slimed in Tribeca.

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

A terrific purveyor of natural history objects and curios.

The "first cat," "first dog," and even a presidential pygmy hippo all get their due in this museum.

Conveniently located within binocular range of a nuclear bunker, the "summer camp" area was a painfully obvious spy house.

The FBI's urban training course may have the highest fake crime rate in the world.

An eccentric company offers eccentric millionaires the opportunity to have spaceflight-related experiences.

Hear, smell, see, taste, and touch history at this immersive Civil War hospital.

A bunker "with enough U.S. currency to replenish the cash supply east of the Mississippi" in the event of nuclear war now protects nitrate film.

Under a playground is a little-known sealed train tunnel that likely contains the bodies of workers trapped by cave-ins.