A centuries old castle atop a dormant volcano houses museums devoted to both women and witches.

A small museum filled with over 1,000 clocks, and one particular clock calibrated to run until the year 9999.

Terrifically morbid cemetary and site of famous Paracelsus' grave.

This outsider art house has gone from clinical creation to astounding artwork.

A spherical "micro-nation" in the heart of Vienna.

Macabre museum devoted to historical Viennese murders.

This Austrian museum celebrates the work of famous forgers and their inimitable imitations.

This former insane asylum now holds a pathological anatomy museum.

One of the best collections of wax anatomical models in the world.

Beautiful Austrian natural history museum with carved ceilings and row after row of ancient taxidermy.

The crypt of the imposing Stephensdom holds royal intestines and thousands of skeletons.

The beautiful baroque library of the Hapsburg empire.

Museum devoted to the artificial language of Esperanto.

A seven-century-old jail tells a not-so-pleasant history of crime and punishment.

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

A saintly relic hidden in a Prague church basement.

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

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

A collection of anatomical samples from one of the first anthropologists to suggest that humans reached North America by crossing the Bering Strait.