The small alleys in Lübeck's Old Town are a result of medieval urban sprawl.

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

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

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

This small Bavarian graveyard is filled with empty graves for German soldiers lost during the World Wars.

Thousands of tourists and residents in Cologne affix "love padlocks" on the Hohenzollernbrücke Bridge to symbolize their affections.

This mine is home to the largest man-made hole in Europe.

Largest illuminated advertisement sign in the world.

The Bauhaus-style former industrial complex is considered the world's most beautiful coal mine.

The world's biggest pet store.

This former steel and coal plant is now a neon-lit industrial fantasia.

An amusement park on the grounds of an unused nuclear power plant, with a swing ride inside the cooling tower.

These tenacious 14th-century towers defied demolition and are now a fairytale vacation rental.

This Cistercian monastery was the first in the German-speaking world

Cages that once displayed the bodies of executed leaders hang from a German church tower.

An industrial relic is now one of Europe's most staggering art spaces.

This massive steel pyramid can be entered by a set of jagged steps that let visitors stand in its heart.

This monolithic slab of art metal crowns a German slag heap.