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

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

Peek through the gates at this oasis from the city, full of Old English charm.

This Upper East Side apartment co-op was designed as a tuberculosis sanitarium.

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

Bowl in splendor, if you're lucky.

This tiny store is your one-stop shop for all sorts of rare and wonderful buttons.

Thriving meadows span a rooftop in one of Brooklyn's most heavily industrialized neighborhoods.

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

One of the last full-orchestra recording studios in New York City and an acoustical marvel.

Series of storm drains connected to a dark urban legend.

An arcade packed with a rotating collection of unique independent video games.

This Queens hospital has stood abandoned for almost 20 years after its patients were secretly relocated in the dead of night.

NYC's legendary underground network for bovine transportation.

A semi-scholarly approach to sex.

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

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

Jimi Hendrix's legendary recording studio in Greenwich Village.

Hidden behind a gate in Greenwich Village is a little farmhouse that once served as the writing studio of a bestselling author.

This iconic tattoo shop has its own onsite museum with artifacts from the early history of modern body art.

A reservoir of vintage pinball machines and arcade games for the nostalgic and thrill seeking.

A tiny museum housed in a New York freight elevator specializes in the "overlooked, dismissed, or ignored."

This humble historic facade hides a history of boozing and the gentlemanly sport of rat-fighting.

A modern zoetrope on the New York City subway.