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

Abandoned power station once home to a squatter community, now being developed into an arts center.

A museum devoted to bringing to light forgotten or neglected histories through exhibitions, education and public programming.

An illegally built ramshackle mansion tucked in the middle of Brooklyn is now being turned into condominiums.

Volunteer-run library dedicated to exploring five decades of activism history.

Detailed facade of a brownstone in Boerum Hill.

Hidden in an ordinary Midtown building is a one-room museum dedicated to the greatest escape artist.

Former self-sufficient mental institution now a planned community.

The world's second-longest burning light bulb.

A medical facility that has been kept frozen in time.

A Victorian mansion, painstakingly reproduced to appear just as the the Munster's family home did on TV.