Colorful lights and mirror-like brine pools create trippy illusions within the historic mine.

An Irish church where an 800-year-old mummy is reaching out of his coffin as if to shake hands.

A 400-year-old mummified arm dangles from the ceiling of St. James the Greater, serving as a warning to thieves.

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

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

This automated sculpture of two men peeing will spell out text messages with their micturition.

The first museum in the world devoted to sexual gadgetry.

A Baroque mansion with ties to legendary magicians and alchemists.

The risqué mixed-media sculptures are supposedly a metaphor for Czech politics.

Poland's oldest salt mine has nearly everything one needs to live underground forever.

An underground city of salt.

A Danish fisherman spent 25 years covering nearly every inch of his home with tens of thousands of shells as a gift to his wife.

Hidden beneath a bridge, this waterfall is known for the large amounts of graffiti painted on its base.

A modern Nordic Pompeii on the Icelandic island of Heimaey.

This fantastical waterfall is hidden in a cave located in a cracked cliff.

This museum explores how a 1973 volcanic eruption forever changed this small Icelandic island.

The world's largest underground iron ore mine.

A museum dedicated to a Cold War era sausage.

The Lund University's former gym houses a museum focusing on the creative process of art.

Home to 200 plaster casts of Scandinavian proboscises.

This collection of 80 polarizing foods aims to challenge your subjective notions of repulsion.

Visitors are treated to a stained glass kaleidoscope interior inside this work of art.

A novel collection of medical curiosities housed in an 18th-century surgeon training academy.

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