The feral felines of Roosevelt Island have a small army of allies and an abandoned hospital all to themselves.

A toxic ghost town sitting atop a massive coal fire.

Hellam Township is reputed to feature seven remote gates, which when passed through in the right order, open an entrance to hell.

Site of a former hidden treehouse in New Orleans.

Museum dedicated to awful artwork.

Dr Barnes' $25 billion private collection of art and arboretum.

World's first "penitentiary," meant to be humane, drove men insane.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

One of the last few places in Manhattan that employed a pneumatic systemic keeps it on display.

A living archive of urban activism and space reclaimed.

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

A tiny islet just off Long Island offers a wealth of infectious curiosities.

Reverend Jen's unique museum/living room showcases her troll collection.

Try not to get slimed in Tribeca.