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

The world's first clock to use set theory as a measure of time required the invention of a new light bulb just to maintain its obtuse measurements.

Twisted buildings adorn the banks of the Rhine river.

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

Solar observatory doubles as a daring display of Expressionist architecture, much to Einstein's chagrin.

Hitler's bleak vision of relaxation still stands as a mostly abandoned 10,000-room resort complex.

A unique hanging cable-car navigates through Dresden, the oldest suspension railway in the world.

This Dresden church was purposely rebuilt Protestant after being demolished in World War II.

A former ironworks that was the first UNESCO industrial site.

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

Berlin's old airport.

Floating swimming pool within a moored vessel.

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

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

The "Prussian Versailles" that is as glorious today as when it was built.

Berlin's natural history museum houses the world's largest mounted dinosaur and the late beloved polar bear Knut.

A museum dedicated to the history of a terrifying secret police is now held in their former headquarters.

A German apartment building hosting as many trees as human occupants.

The 1936 Summer Olympics site is a crumbling remnant of sportsmanship and a history its host country would like to forget.

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

This "floating railway" is one of the world's oldest monorail systems.

Explore the complex ecology of this multifaceted nature preserve by riverboat.

A tree-like building perches on its trunk in the Steglitz neighborhood of Berlin.

The prototype for all Nazi concentration camps.