Medicinal spa created with the discharge from a geothermal energy plant.

A formerly abandoned mental institute, now back in business.

This hospital once pioneered the use of electroencephalograms, but fell into maltreatment, abuse, and eventual abandonment.

An abandoned castle owned and ignored by Masons carries a cursed history.

One of the oldest medical collections in Europe focusing on rare surgical instruments.

First planned industrial community in the United States.

An abandoned asylum incorporated into a college campus.

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

Tucked in the back of this amazing antique store is an important piece of medical history.

Abandoned 19th century homes once occupied by naval officers, soon to be demolished.

Try not to get slimed in Tribeca.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

This beautiful building in the heart of Manhattan's Financial District was empty for decades.

Series of storm drains connected to a dark urban legend.

The most unloved grain elevator in Brooklyn was a “Magnificent Mistake.”

A massive forgotten storehouse from 1913 on the Brooklyn Waterfront has a spectacular view of Brooklyn.

A particularly creepy abandoned hospital that sparks interest for lovers of the supernatural.

Headquarters of the legendary clairvoyant's readings, spiritual hospital, and massage school.

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

Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."

A tradition unlike any other, this marks the site of the annual Groundhog's Day tradition.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

Take an otherworldly journey in a school dedicated to out-of-body experiences.

America's first public mental health facility.