Locals purchased this abandoned quarry in order to make sure it continues to be overgrown.

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

The bears may be gone, but their old cages can still be found.

This miniature feudal castle was built on a whim to honor a US Navy pioneer.

Eclectic collections, artwork, and some feline friends fill the writer's former home.

The American Revolution was galvanized into serious action due to the tragic clash with British soldiers that occurred at this location.

No one really knows how these old hobby horses got here, but the herd keeps growing.

Site of a famous 19th-century transcendentalist utopian community, now abandoned.

Three prestigious academic collections come together to create a world-class natural history museum.

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

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

This Boston medical museum features the skull of the famous medical case of Phineas Gage.

Eighty million natural history specimens call this gargantuan museum home.

A vast overgrown cemetery, once known as one of London's "Magnificent Seven."

The most iconic structure in Scotland has been home to bishops, colonels, and Sean Connery characters.

The hidden "ballroom" under a mansion lake was built by a criminal who ate a cyanide pill during his trial.

17th century streets hidden under Edinburgh were once a breeding ground for the black death.