This abandoned psychiatric hospital once housed more than 4,000 patients in the middle of a quaint New England town.

Ruins of a historic medical facility sits eerily by the water.

Underground tunnels remain beneath this abandoned mental asylum.

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

Unlike other abandoned asylums this empty institution welcomes visitors, just don't go in the buildings.

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

This abandoned radar station from the Cold War era now only broadcasts a seriously ominous air of isolation.

The abandoned ruins of America's first private zoo are open for exploration in the Catskills.

The once abandoned ruins of a Victorian beachside amusement park are now back in working order.

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

The 100-year-old public collection of a New Hampshire dentist that contains taxidermy, Native American artifacts, and a pair of mummy hands.

This World's Fair showpiece was built in Chicago, but shipped to Maine.

This 90-year-old building is home to possibly the most New Englandy social club in existence.

This fairy tale-themed amusement park is now abandoned, and childhood metaphors abound.

A miniature village lies nearly forgotten in the forest by the side of a major highway.

A religious-themed park filled with folk art to bring biblical stories to life that fell into disrepair and now being restored.

Astounding collection of coin-operated games and automata.

Explore the dark underground corridors of this graffiti-covered former military fortification.

This tiny patch of arid sand sits in one of the greenest states in the United States.

The world's only international cryptozoology museum is host to an unrivaled collection of mysterious objects.

The world's largest rotating world.

This 1,700-pound edible sculpture is way better than your average chocolate mousse.

Macabre headstones carved with winged skulls, dancing skeletons, and pithy reminders of impending death.

A morbid secret lies hidden within the beautiful walls of the Boston Athenaeum.