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

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

This unmarked and unloved Manhattan subway grate created one of the most iconic images in American cinema.

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

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.

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

More gold than anywhere else, ever.

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

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

New York City's smallest piece of private property.

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

A dilapidated dock tells the story of Titanic's missed arrival.

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

Read a book next to a Midtown waterfall.

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

During the holidays, a vintage subway train whisks New Yorkers back in time.

A treasure trove of artifacts, books, and artwork from the "golden age" of exploration.

Tucked in the back of this amazing antique store is an important piece of medical history.

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

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

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