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

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

A bust of Franz Kafka spins in pieces, reflecting the writer's inner torment.

Two stunning 17th-century libraries and a cabinet of curiosities.

Famously misunderstood wonder of the ancient world

The history of occult science is turned into a creepshow at this lurid Prague tourist attraction.

The macabre collection of Jacques Sirgent, an expert scholar on the undead and all of their trappings.

On Japan's Tashirojima Island, cats are king.

An small and easily overlooked archaeology museum chock full of Egyptian artifacts.

A church that bred legends, and served as an inspiration for the Da Vinci Code.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

This South London cemetery holds the remains of more than 15,000 people.

This fairytale castle was built as a show of power but was nearly torn down thanks to its history of torture.

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.

An open-air sewer system that was covered piece-by-piece over 300 years.