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

The oldest surviving synagogue in New York City is now a soaring art space.

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

An unassuming secret door once led to a legendary watering hole.

Sniff the Titan Arum's rotting flesh.

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

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

The world's oldest hologram gallery and the labyrinthine laser laboratory of a holography pioneer.

The oldest operating apothecary in the US has treated everyone from Thomas Edison to Mark Twain.

One of New York's best collections of pinball is hidden in a secret bar in the back of this laundromat.

A tunnel once abandoned now thrives with graffiti art as an off-limits makeshift gallery.

The oldest surviving bridge in New York City, which reopened to pedestrians in 2015.

Mysterious 500-year-old tapestries depict a unicorn hunt.

A legendary speakeasy bookstore returns from the brink.

Hidden in an ordinary Midtown building is a one-room museum dedicated to the greatest escape artist.

A three-story copper skybridge connects two Manhattan buildings with Art Deco luxury.

Ride the subways of yesteryear.

A room in New York City that contains 250 cubic yards of dirt worth a million dollars.

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

Become a prohibition rebel.

One of only two commuter aerial tramways in the United States.

New York City's smallest piece of private property.

Hidden in Central Park's Ramble is a troublesome cave buried just beneath the surface.

A DIY art gallery/music venue/lecture hall dedicated to video game culture.