This contentious squat has stood through fire, violence, and government intervention as a hotbed of leftist protest.

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

The last bastion of Roman presence north of the Alps looms over a German town.

Hamburgers are intensely proud of their tunnel beneath the river.

Twisted buildings adorn the banks of the Rhine river.

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

This 600-year-old home seems to defy physics.

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

A castle from the Holy Roman Empire that hosts traveling youth... in its stables.

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

This incredible stone temple is a monument to death, victory, and fantasy architecture.

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

Once the tallest building in the world, this abandoned church is now a monument to the destruction of WWII.

The site of the famous Nazi book burning campaign of 1933 remembers its "Night of Shame".

No need to strap in for a "ride" on this walkable roller coaster.

This medieval castle overlooking the Elzbach river looks just like it did hundreds of years ago.

Between Neo-Pagans and Neo-Nazis, these strange rock formations have a curious cult following and a very strange history.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

This historic stone bridge has an entire neighborhood clinging to its sides.

The largest free-standing aquarium in the world resides in a hotel lobby in Berlin.

A sprawling Baroque park with 300-year-old hydro-pneumatic waterworks.

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