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

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

Unlock the secrets of the conjuring arts.

One of the last few places in Manhattan that employed a pneumatic systemic keeps it on display.

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

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

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

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

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

From scholastic to sepulchral - now under reconstruction.

A celebration of capitalism in Midtown.

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

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

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

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

A New York garbage depot holds a secret collection of weird and wonderful refuse.

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

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

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

More gold than anywhere else, ever.

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

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

New York City's smallest piece of private property.

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