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

An illegally built ramshackle mansion tucked in the middle of Brooklyn is now being turned into condominiums.

HBO series' stage tucked away in a Greenpoint lot is the largest theatrical set of its kind in the United States.

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

Three stories above you, your salad is being grown.

A huge resale shop for the cast-offs of the film & television industry.

NYC's legendary underground network for bovine transportation.

Haven for steampunks.

Steam out your ears for New Year's Eve.

An unconventional space for art and science housed in a massive old warehouse.

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

A modern zoetrope on the New York City subway.

This innocent-looking townhome is actually a subway exit.

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

The site of the deadly Triangle Shirtwaist Factory Fire.

Phil Mortillaro uses keys to bring art back to the Village.

Prove you deserve to be fed by Kenny Shopsin.

Become a prohibition rebel.

Walk over a 150 year old manhole.

A celebration of capitalism in Midtown.

Cold storage for agricultural biodiversity.

Self-sufficient greenhouse floating on the Hudson River.

New York City's smallest piece of private property.

In the middle of downtown Brooklyn lies a 165 year old secret hidden right below the surface (closed to the public indefinitely).