Fall down the rabbit hole into a surreal journey of human consciousness "from ass to soul."

This futuristic German spa allows visitors to float in a pool of salt water while zoning out to underwater techno.

Berlin's oldest surviving academic architecture hosted decades of animal dissections.

A surreal museum of extraordinary industrial objects.

Where Aleister Crowley taught magick in "La Chambre Des Cauchemars," his "Chamber of Nightmares."

A unique seaside cave where Aleister Crowley faked his own death.

Giant topiary dog once played a role in a terrorist bomb plot.

Hidden behind a wall for decades, this masonic lodge was only rediscovered during renovations.

The hallucinogenic center of the ancient world.

The rocky remains of an ancient Greek forest.

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

Inside a former cabaret, seven floors of erotic art.

BDSM, 1930s Style.

A Parisian cemetery where the elite and artistic are interred beneath an eccentric collection of tombs.

Abandoned medieval hill town.

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

A tiny rural community in Switzerland was home to one of history's most shocking murders, and led to the banning of Absinthe for nearly a century.

Museum of science fiction, utopias, and extraordinary journeys of the mind.

A museum dedicated to the alleged Roswell Incident.

Large Hadron Collider and the Birthplace of World Wide Web.

The bizarre visions of H.R. Giger, tucked away in a Swiss medieval city.

Hundreds of secret cabinets built into the walls of legendary poisoner's private work room.

A nearly 500-year-old sculpture depicts a man eating a sack of babies, and no one is sure why.

Giant, pink stuffed rabbit on an Italian mountain.