This decrepit abandoned building is made all the more eerie by its dark history.

Once a place of peaceful repose, this sanitarium now faces an uncertain future.

A long abandoned hospital building on the outskirts of NYC.

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

This notorious Canadian mental institution was home to some of the first LSD experiments and origin of the word "psychedelic."

Beneath the mossy overgrowth covering this once-sprawling campus lies decades of history and the secrets that come with it.

Historic psychiatric asylum and most-filmed location in the Great White North.

A formerly abandoned mental institute, now back in business.

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

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