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

Century-old shop, specializing in Occult products.

In the early 1800s, surgery was also a show.

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

Huge masonic hall in Philadelphia with lavishly themed rooms.

An abandoned Gold Coast-era mansion once intended for the exiled ruler of Albania, who never arrived.

An eccentric playboy's astounding natural history collection.

The loneliest island in New York.

The oldest continuously operating farm in New York State.

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

A formerly abandoned mental institute, now back in business.

Enjoy an overnight at an old haunted B&B site of the Borden family murders.

Museum dedicated to awful artwork.

Books bound in human skin and H. P. Lovecraft's letters are among a few of the treasures this library has to offer.

A vast collection of rare books, manuscripts & extraordinary objects illustrating the history of medicine.

Failed state-supported institution meant to rehabilitate students with intellectual disabilities.

Eccentric concrete mansion and museum designed and built by hand from the inside out.

Mysterious rocks that ring musically when struck.

A reproduction of earth's many biomes.

A historic house left in "dramatic still life."

The vast, legendary catacombs hold secrets much stranger than stacked bones.

An Irish church where an 800-year-old mummy is reaching out of his coffin as if to shake hands.

This series of Scottish caves has no clear purpose other than baffling historians.

"Respectful to the dead, safe and sanitary to the living, dedicated to the Genius of Memory..."