A former imperial sea-fortress and Soviet prison.

Disused seaplane hangar gets a second life as the jaw-dropping home of Estonia's museum of maritime history.

The ruins of an Estonian prison are drowning in the quarry lake where the convicts were once forced to work.

Tiny memorials honor individual victims of the Holocaust.

Largest illuminated advertisement sign in the world.

This proud Teutonic warrior rises out of a German forest heralding a victory and measuring lightning.

Tucked away in a small German apartment is an eclectic museum devoted to West African vodun culture.

Berlin's beloved bear is immortalized at the Museum für Naturkunde.

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

According to a satirical conspiracy theory that persists today, this German city of 300,000 is a hoax invented by the CIA.

The world's biggest pet store.

This museum tells the story of lake dwellers from 4000 BC to 850 BC, replete with stilt houses and goats.

A statue honors the local legend that the devil helped build St. Mary's church after being tricked into thinking it was going to be a wine bar.

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

A 12th-century fortress containing some of Berlin's oldest buildings.

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

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

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

Berlin's old airport.

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

A church filled with the bones of hundreds of virgins martyrs—or so they say.

This Berlin island is home to a flock of free-roaming peacocks, as well as a historic ivory folly.

Home to 10,000 medical specimens including the remains of Rudolf Virchow's extensive collection of pathological specimens.

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