Folklore says this medieval fortress was plopped atop a portal to hell to trap the demons below.

Underneath this small church are 15,000 bones, arranged by an obsessive academic.

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

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

The hidden lair of an alchemist rediscovered in a 2002 flood.

A saintly relic hidden in a Prague church basement.

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