Run by a eugenics advocate, this aging institution conducted secret radiation experiments sponsored by Quaker Oats.

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

First a horse rendering plant, then a 19th century landfill, this beach is full of glass from thousands upon thousands of broken bottles.

A formerly abandoned mental institute, now back in business.

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

This once luxurious Catskills resort is now a haunting ruin.

A long abandoned hospital building on the outskirts of NYC.

The saddest little diner in New York.

This Queens hospital has stood abandoned for almost 20 years after its patients were secretly relocated in the dead of night.

Decades after testing the polio vaccine on unwitting patients, this historic mental hospital sits in ruin.

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

This former theme park in New York's Adirondack Mountains fell into ruin before being resurrected as a state-run campground

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

A forsaken wonder in the middle of the East Side neighborhood.

A mysterious, abandoned building rotting on the Brooklyn waterfront.

Buffalo's abandoned concrete grain elevators are getting a second life.

An abandoned tuberculosis hospital moulders on into an uncertain future.

Built to be the ideal penitentiary, this abandoned panopticon saw several revolts and even a prisoners' coup.

An abandoned desert hamlet swallowed up by sand.

Abandoned for over a century, this chilling train tunnel is now a destination for ghost hunters.

The untimely death of a dignitary's daughter led to this fort being abandoned before it was ever finished.

An abandoned 146-acre summer resort slowly being reclaimed by nature.

An overgrown and abandoned tuberculosis ward resides in the midst of a quaint modern neighborhood.

The ruins of an abandoned crematorium haunt an eerie deserted German cemetery.