This Navarrese cave's history of witchcraft and pagan ritual is not just embraced, but recreated each year.

Mysterious Spanish catacombs of unknown origins.

A museum dedicated to the Spanish occult in a town that was terrorized by the Inquisition.

Venice's island of the dead.

This Venice bookstore has resigned itself to constant flooding by keeping its books in bathtubs and boats.

A Hungarian pharmacy museum with a box full of mummy powder.

A museum in the childhood house of a medical pioneer.

This community on a small Venetian island has taken to painting their houses in bright neon hues.

The plague quarantine island home to the alleged "Vampire of Venice."

The oldest of Venice's plague quarantine stations, designed to keep the medieval city safe from disease.

A small island less than half a mile from Venice is a forbidden island with a dark and twisted past.

Venice's "Island of the Mad."

As can be expected from a centuries old church built in a canal city, the undercroft of this house of worship is beautifully flooded.

Go inside to really appreciate this 500-year-old technological masterpiece.

Collection dedicated to funeral rites, equipment, and mourning rituals of the Viennese.

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