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

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.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

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

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

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

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

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

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

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

A masterpiece of LGBT art has been restored in what may now be the most valuable restroom in America.

Become a prohibition rebel.

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

More gold than anywhere else, ever.

New York City's smallest piece of private property.

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

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

Under a glass sidewalk lie the remains of some of Manhattan's oldest buildings.

A Pythagorean funhouse that tries, successfully, to prove that math is the coolest thing ever.

A miniature rainforest is growing inside of a Midtown Manhattan office building.

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.

Elevated freight railway turned wildly successful urban park.