Walk inside a half mile long crevice right outside the town of Garmisch Partenkirchen.

No matter how many times this community-run sauna gets destroyed, it always rises from the ashes.

Legend says a witch conjured the world's third largest whirlpool to protect Scotland from a nasty pirate.

This oddly beautiful water cistern is a techno-temple to the wet stuff and a multimedia masterpiece.

Twice a year, this floating library delivers thousands of books to the remote islands of Stockholm’s archipelago.

The fairy tale castle of the "fairy-tale king."

Visitors dip into a variety of pools of what was once ice.

Double spiral staircases are not unheard of, but they are very rare.

Dress up like a miner and take a slide into the disco-lit depths of this once foundational salt mine.

Soaring over 6,000 feet in the Bavarian Alps, this beer garden was once Hitler's 50th birthday present.

The largest ice cave in the world is thought to be the entrance to hell according to Austrian legend.

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

Each year melting snow turns these Austrian hiking trails into scuba zones.

Swarovski's museum/theme park is a fake diamond fantasia overlooked by a giant.

Macabre museum devoted to historical Viennese murders.

Trick water gardens from 1619 featuring a 200 piece mechanical theater powered by water.

This artificial cave looks like something out of a fairytale.

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

This region of Slovakia boasts some of the most plentiful opal mines in the world.

This walkway is so narrow it needs its own light to stop pedestrian traffic jams.

An eerie, existential museum dedicated to the author of "The Metamorphosis."

Climb around the high waterfalls on series of iron ladders and bridges within the wildest gorge in the Slovak Paradise.

Countless grotesque faces stare out from this eerie Prague art wall.

A Jenga-style cylindrical tower of books that appears to go on forever.