This Wall Street bar was once a hub of revolutionary activity where Washington famously bid farewell to his troops.

The first and only carousel with a lineup entirely of insects.

One of the most enjoyable bits of history at Coney Island and “the most romantic ride in the world.”

The beautiful tunnel that ran from the lobby to Penn Station is still hidden underneath 34th Street.

This empty Victorian manse on Staten Island is said to be haunted but is actually a real life crime scene.

The final resting place of the great escape artist, where some still gather to wait for his escape from death.

Love, knishes, and best wishes from this legendary Lower East Side bakery.

A band of aerialists and circus performers putting on incredible shows in East Williamsburg.

One of the last Jazz Age "Wonder Theaters" in New York City.

Nondescript elevator doors open to reveal a stunning, surreal world.

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

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

Nikola Tesla's former home contains an homage hidden from plain sight.

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

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

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

A semi-scholarly approach to sex.

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

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

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

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

Try not to get slimed in Tribeca.

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

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