London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

This once luxurious Catskills resort is now a haunting ruin.

An eccentric playboy's astounding natural history collection.

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

The haunting, dilapidated remains of a former poorhouse on Staten Island's Greenbelt.

Holding the most bodies of any cemetery in the United States.

The world’s first penitentiary, meant to be humane, drove men insane.

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

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

The tomb of one of Scotland's bloody historic villains is a magnet for bumbling desecrators.

The most loyal of little dogs, or a Victorian era publicity stunt?

These tiny effigies are believed to represent victims of Edinburgh’s notorious Anatomy Murders.

This 17th-century street hidden beneath Edinburgh was once a breeding ground for the black death.

Ruined 11th century abbey built by King David I in Edinburgh, Scotland.

This abandoned Poconos resort is haunted by a history of kitschy romance and a violent fugitive.

This shop and gallery is a modern-day cabinet of curiosities, unassumingly positioned along an urban thoroughfare.

The only university zoological museum in London houses extinct animals, bizarre natural history specimens, and a Micrarium of microscopic creatures.

A Victorian natural history and ethnographic museum with wonderful turn-of-the-century, science-book-esque evolution displays.

The anatomical-pathological collection of a man who changed surgery.

This mouldering abandoned mental hospital was once a center for progressive healing.

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

The abandoned husk of a mental institution that failed to save a Jazz Age icon still sits nearly unchanged.

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

A formerly abandoned mental institute, now back in business.