Elevated freight railway turned wildly successful urban park.

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

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

More gold than anywhere else, ever.

This little museum is built on a theater that was once a wildly elaborate speakeasy.

New York City's smallest piece of private property.

Become a prohibition rebel.

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

This lower Manhattan bar is set up in an old bank vault that rests beneath a skyscraper that hides even more historic splendor.

Read a book next to a Midtown waterfall.

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

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

From scholastic to sepulchral - now under reconstruction.

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.

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

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.

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

Walk over a 150 year old manhole.

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

The oldest bibliophilia club in America, with exhibitions on historic books and graphic arts.

This ruined fort hidden at the top of Central Park can't seem to keep from losing its historical plaques.

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