This abandoned asylum was once a state of the art facility before devolving into one of the most deadly mental institutions in American history.

A crumbling hospital from the 1850s on Roosevelt Island.

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

This outpost of America's most popular fast-food restaurant is housed inside a palatial mansion.

The inspiration for H.P. Lovecraft's horror stories and Batman's Arkham Asylum is now a condominium complex.

A long abandoned hospital building on the outskirts of NYC.

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

Naturally formed white marble arch housed in an abandoned marble quarry from the 1800s.

An upstate New York garage advertises its services by literally putting the automobile above all else.

The abandoned husk of a mental institution that failed to save a Jazz Age icon still sits nearly unchanged.

An abandoned asylum once on the cutting edge of lobotomies may be reborn as a Christian college.

This abandoned cemetery is crumbling into ruin, exposing the artifacts and bodies buried there.

This lush forest valley was once mined for lumber to the extent that it was once nicknamed "The Pennsylvania Desert."

An old dining hall now serves up ghost stories for lusty locals.

The remains of a failed subway in upstate New York is now an underground graffiti bunker.

Home on the Hillside, and home of the first breakfast cereal.

Eclectic architecture in the woods of New York.

Possibly the smallest church in the world floats in the middle of a pond.

A field in which God and his son Jesus purportedly appeared to a young farm boy named Joseph Smith.

Surprisingly aquamarine waters fill deep lakes formed at the end of the last ice age.

The wooden octagon in which Huckleberry Finn and A Connecticut Yankee were born can still be visited in upstate New York.

World's largest herd of white deer populate a former U.S. Army depot.

In upstate New York, gorgeous waterfalls and a watermill are slowly being reclaimed by nature.

The haunting, dilapidated remains of a former poorhouse on Staten Island's Greenbelt.