A three-story copper skybridge connects two Manhattan buildings with Art Deco luxury.

The famous facade of Grand Central Terminal hides a regulation tennis court, and it's not the first one.

Spinning silently in the lobby of an Art Deco masterwork is a massive vintage model of the Earth.

This ruined fort hidden at the top of Central Park can't seem to keep from losing its historical plaques.

A quiet and contemplative oasis in the middle of New York's bustle and riot.

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

What happens here stays here – unless it affects the whole world.

Hidden in one of New York's oldest subway stations is the final remnant of the site of the bizarre Shakespeare Riots.

A partially hidden wall graffitied by spectators of the 1976 Bicentennial, recently rediscovered.

Series of storm drains connected to a dark urban legend.

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

A strangely angled West Village home is the only monument to an explosion that took the lives of three American revolutionaries.

A Manhattan courthouse hides a small but scathing memorial to Holocaust injustice.

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

Skewer up Kangaroo.

The greatest real estate coup of all time.

The tiniest little stage in New York.

A prohibition era watering hole for the police.

Gang fights don't just happen on the streets, they happen under them too.

La Monte Young and Marian Zazeela's "Dream House" will immerse you in an ever changing world of sound and light.

Hear the tales of New York's most notorious criminals.

Currently housing a corporate bank branch this building at the southern tip of Manhattan was once the gateway to luxury vacationing.

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."

Looking for a crappy restaurant? Pull up a porcelain bowl and enjoy your meal.