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

Become a prohibition rebel.

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

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

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

A crumbling hospital from the 1850s on Roosevelt Island.