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

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.

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

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

A hands-on traveling collection of the innovative devices of yesteryear.

Under a glass sidewalk lie the remains of some of Manhattan's oldest buildings.

A miniature rainforest is growing inside of a Midtown Manhattan office building.

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

The oldest family-run luncheonette in New York, last renovated in 1948, still serves food and drinks the old-fashioned way.

New York's oldest magic store.

Try not to get slimed in Tribeca.

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

A tiny museum housed in a New York freight elevator specializes in the "overlooked, dismissed, or ignored."

A crumbling hospital from the 1850s on Roosevelt Island.

La Monte Young and Marian Zazeela's "Dream House" will immerse you in an ever changing world of sound and light.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

A terrific purveyor of natural history objects and curios.

An enormous overgrown greenhouse teeming with graffiti and wildlife.

Filled with history, this cemetery is maintained each summer by a few hungry goats.

Originally built in 1869, this castle is currently part of Felician University's campus.

One of New Jersey's oldest churches is a historical treasure trove.

A "Bugseum" dedicated to all things insect-related resides behind a pest control company.

On the Hudson resides one of the largest clocks in the world.