A historic 1890s architectural masterpiece with an iconic clock tower that, once open to the public, now faces an uncertain future.

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.

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

A celebration of capitalism in Midtown.

A Pythagorean funhouse that tries, successfully, to prove that math is the coolest thing ever.

Manhattan’s Battery Park has a whimsical carousel full of spinning, glowing fish.

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

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

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

Peek through the gates at this oasis from the city, full of Old English charm.

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

Amid the bustle and noise of the Financial District hides a secluded garden oasis above the city streets.

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

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

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

Elevated freight railway turned wildly successful urban park.

Try not to get slimed in Tribeca.

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

A terrific purveyor of natural history objects and curios.

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