Underground vaults of a former brewery beneath Brooklyn's Crown Heights are now used to ripen cheese.

This abandoned caretaker's apartment is one of 13 left in the New York Public Library system.

A massive forgotten storehouse from 1913 on the Brooklyn Waterfront has a spectacular view of Brooklyn.

A little lighthouse in New York City, surrounded by mysterious stories of insanity-driven construction.

Where now stands a 42-story condominium tower of marble, glass and steel was once the central market of New York’s slave trade.

An odd, ancient window that may have once been part of a brutal prison is embedded in the side of New York's Police Plaza.

Rummage through this sunken ship, but leave your scuba gear at home.

A once crucial portion of the Long Island railroad still lays abandoned, waiting to be turned into an urban park.

More than 250 sakes are available in an izakaya hidden in the basement of a Midtown office building.

Relics given to a Manhattan church to avoid seizure by the Italian government.

A small peaceful park and waterfall tucked amid the urban grind of Midtown Manhattan.

Finally, you don't have to be a pious Swedish seaman to relax like one.

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

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

This plot of old-growth forest is the largest surviving remnant of New York City's original woodland.

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

This otherwise innocuous bodega was once the headquarters of the most feared assassin's guild in American history.

A hyper-luxurious, 12,000- square foot home might be buried beneath Queens, still waiting to protect you from nuclear missiles.

Built as a gift to the hottest tastemaker of the time, these hidden quarters remain an Art Deco showpiece.

Deep under Manhattan is the largest construction project in city history. So far, the project has taken the lives of 23 workers, or "a man a mile."

The crown jewel of the Queens Museum is a nearly 10,000-square-foot architectural model of the city originally built for the 1964 World's Fair.

Prove you deserve to be fed by Kenny Shopsin.

Once America's longest-manned military fort, now an abandoned hulk.

A living archive of urban activism and space reclaimed.