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

Failed state-supported institution meant to rehabilitate students with intellectual disabilities.

On the Hudson resides one of the largest clocks in the world.

This evocative New Jersey statue memoralizes the Polish victims of a Soviet massacre.

Hidden in plain sight on the Hudson River is an abandoned train station where nature has taken over.

Lie in a hammock where George Washington stood.

The remnants of two World's Fairs are here, complete with a 12-story globe, a mini-Manhattan, and a UFO-shaped pavilion.

A drawbridge named for a potentially intersex Polish national who fought alongside George Washington during the American Revolution, and an example of "Pulaski Red".

At this hidden studio, the dying art of taxidermy is alive and well.

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

A modern zoetrope on the New York City subway.

Behind a bodega is a small museum of relics and ephemera showcasing the history of New York.

A Wisconsin kitsch palace from the 1930s lives its second life in 21st-century Brooklyn.

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

Check out the underground party scene at the "Burning Man of Brooklyn."

A massive art collective tries a new take on Brooklyn's DIY music scene—by making it fully legal.

The oldest Dutch colonial stone house in New York City is a hidden gem on the border of Brooklyn and Queens.

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

Four cars from the old system were once on display, but were removed in 2014.

The highest rapid transit station in the world.

A museum devoted to bringing to light forgotten or neglected histories through exhibitions, education and public programming.

This enormous banquet-themed artwork honors over 1,000 notable women throughout history.

Sniff the Titan Arum's rotting flesh.

A Victorian cemetery in the heart of Brooklyn remains a popular mecca of morbid curiosity.