Hordes of precariously balanced stone figures crowd the shores of the Hudson River.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

Unrepaired walls from a 1920 anarchist bomb attack.

Empty, but not abandoned, this cavernous Brooklyn loading dock was once considered the largest individual building in the world.

This neighborhood grocery houses a treasure trove of Eastern European delights.

The New York hotel where tragic visionary Nikola Tesla spent his final hours, destitute and alone but for the pigeons.

Avoid gangster interaction while window-shopping.

This futuristic airport terminal was abandoned for decades before reopening as a hotel—with a vintage plane of its own parked out back.

This hidden library of physiological ephemera contains centuries worth of knowledge on the vim and viscera of the human body.

The oldest living tree in Manhattan comes shrouded in sinister legend.

A WWI fighter plane and turn-of-the-century penny candy shop are among the unexpected features of this Financial District building.

This innocent-looking townhome is actually a subway exit.

Prove you deserve to be fed by Kenny Shopsin.

Curious crustaceans support an obelisk from ancient Egypt that now stands in modern-day Central Park.

Manhattan's lighthouse, erected at the insistence of the unsinkable Molly Brown.

A bit of retro transportation flair preserved in the world's largest department store.

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

“Invented in Key West, Perfected in Brooklyn."

Hidden in plain sight on a pair of Manhattan subway tunnels are a pair of public instruments that sing to each other.

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

The fanciest public restroom in New York City boasts fresh flowers, art, and a classical music soundtrack.

Lady Liberty's first beacon of enlightenment is now displayed in a museum near the statue.

An uber-secure, windowless tower of doom in the center of Manhattan is an NSA spyscraper.

Leaf through over 30,000 artists' sketchbooks in what may be the world's largest collection of doodles