Incredible labyrinth of man made caves.

Sculpture designed by Turkish artist and professor Mehmet Ali Uysal.

Descend into the tunnels to experience the life of a coal miner.

A Belgian self-built tower inspired by the Bible and ancient civilizations.

This sprawling Belgian fort was once thought of as impenetrable but now it is simply an abandoned relic.

A beautiful maze marks where three countries meet.

What was once a bustling mining installation is now a bustling hub of contemporary art.

This towering church is home to a world-famous organ and a treasure trove of medieval art.

Originally envisioned by King Ludwig II to rival Versailles, Herrenchiemsee's "New Palace" remains half-gilded for lack of funds.

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

A small but immensely extravagant palace built by the "Night King."

The prototype for all Nazi concentration camps.

Four-story slides send people whizzing through the math department at this Munich university.

An abandoned train station in Munich constructed for the 1972 Olympic games.

Golden cobblestones remember a time when this small alley was used to avoid having to give a Nazi salute.

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

A fearsome dragon clings to a corner of Munich's city hall.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

A serious museum dedicated to two German comedians.

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

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

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

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

A small marionette collection located within the dark cellars of an 11th-century Austrian castle.