On the highest peak in the Harz Mountains, science and the occult faced off in a failed attempt to turn a goat into a boy.

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

The birthplace of Karl Marx is now a museum dedicated to the communist revolutionary's life and work.

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

Metro station with a claim to rock n' roll fame.

A strange rock formation with numerous legends trying to explain it.

This temple to the sturm and drang of Richard Wagner contains a dragon's cave and reptile zoo full of living "dragons."

Cold war icon and onetime "hole" in the iron curtain.

One of downtown Berlin's last reminders of its Communist past.

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

This ancient ruined monastery has been destroyed by fire so many times that it seems like God hates it.

A Black Forest cuckoo clock theme park features one timepiece big enough to walk inside.

The great Danube river starts here.

A restaurant and observation deck built in a unique broadcasting antenna.

The prototype for all Nazi concentration camps.

Blitzkrieg bop your way through Berlin's Ramones Museum.

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

A gender-bending antihero's grave, where lies the inspiration for both book and film.

A collection of weird and wonderful art fills a former houseplant nursery.

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

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

A little sculpture with a large wardrobe.

Hiding the longest subterranean river known in the world.

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