For over 30 years the walls of this Harlem schoolyard have been a gallery of street art by "Kings and better."

One of New York's best collections of pinball is hidden in a secret bar in the back of this laundromat.

From scholastic to sepulchral - now under reconstruction.

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

Ride the subways of yesteryear.

Hidden in Central Park's Ramble is a troublesome cave buried just beneath the surface.

A legendary speakeasy bookstore returns from the brink.

A DIY art gallery/music venue/lecture hall dedicated to video game culture.

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

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

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

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

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

The one-stop shop for all of your superhero (or evil arch-nemesis) needs.

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

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

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

A semi-scholarly approach to sex.

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

Manhattan’s Battery Park has a whimsical carousel full of spinning, glowing fish.

This abandoned subway station beneath the Waldorf-Astoria hotel is allegedly used to secretly transport presidents.

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