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

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

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

This water-tower-turned-high-end-apartment building was once the site of an early Nazi concentration camp.

Gardens representing parts of Asia, Europe, and the Mid East are tucked away among the Soviet-style buildings in East Berlin.

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

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

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

Started as a kitchen garden, now the second largest botanical garden in the world.

This fairytale castle was built as a show of power but was nearly torn down thanks to its history of torture.

This city square is home to Amsterdam's oldest church and a statue honoring Dutch sex workers.

Housing the famous Norwegian ice-defying 19th century polar exploration ship.

One man's exploration of the human form, including the bizarre and delightful "Man Attacked by Babies."

The design of this beautifully crafted building was inspired by Norwegian glaciers.

A steel paper plane is all that remains of a crashed aircraft that caused an amazingly small amount of damage.

A Gothic-inspired fish market is Gothenburg's best place to find loaves and fishes.

Swedish skyscraper with a 90° twist.

This chimerical bridge/tunnel appears to dead end right into the sea.

The library's graceful rotunda is like a bibliophile's temple.

The world's largest model of our planetary system.

Stockholm's decidedly unique public transit system has doubled as the world's longest art gallery for decades.

An abstract monument to a symphonic composer.

Giant eggs, walls of bread, and nightmare surreality mark the largest collection of works by Salvador Dalí.

This series of Baroque passageways in Vienna's cultural center mix old architecture with modern art.