This former Nazi castle was built as a school to train what would have been the future of the Third Reich.

A beautiful maze marks where three countries meet.

The largest bell in the world has been swinging high above a Cologne cathedral for almost a century.

An existential riddle in the world's largest ancient castle.

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

A grumpy old water goblin guarding an old mill on the Devil’s Stream in Prague.

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

Bullet holes in the church wall are a reminder of the violence that followed the assassination of a high-ranking Nazi officer.

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

The "feral child" who appeared in Bavaria in the 19th century remains as much a mystery as his unsolved murder.

An ancient monastery, a locked room, and a mysterious book heist.

Go surfing on this urban wave, "hacked" by local surfers.

The footprint of a frustrated devil in Munich's Cathedral.

Oddly enough, a pair of Wolfs funded the construction of this Little Red Riding Hood sculpture.

Take a dip in the world's largest mineral hot springs pool.

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

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

American soldiers discovered Europe's best one-liner at the end of World War II.

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

In this truly magical place, rent hasn't been raised since the year 1520.

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

A remarkable two-country morph, this town is part of Germany legally but is by all other measures Swiss.

In this brilliant blue spring in Germany, legend has it that a sad mermaid learned to finally laugh.

In Rome’s Jewish ghetto, a 200-year-old bakery still makes the neighborhood’s historic sweets.