This Art Deco masterpiece has stood in for some of the most famous buildings in comic book history.

Statue of Lenin, from Cold War era Czechoslovakia, now in a neighborhood of Seattle.

One of the only cooperatively owned bars in the nation wears its eclectic history on its walls.

Not far from Madrid, a set of perfectly preserved trenches date back to the Spanish Civil War.

Among the oldest structures in Madrid, these Moorish walls once guarded the medieval city of Mayrit.

The oldest restaurant in the world is this old-world Spanish eatery, still known for its suckling pig.

Sometimes called the Banksy of Madrid, Muelle was a pioneer of street art in the Spanish city.

These abandoned country fairgrounds are filled with replicas of Spanish monuments.

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

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

A slice of central Asia in the middle of Berlin.

Folklore says this medieval fortress was plopped atop a portal to hell to trap the demons below.

This walkway is so narrow it needs its own light to stop pedestrian traffic jams.

A turn of the century building boasting some of the most beautiful art nouveau architecture in Prague.

The first modernist church in Europe.

The crypt of the imposing Stephensdom holds royal intestines and thousands of skeletons.

The only surviving choragic monument is a trophy awarded in 334 BC for the winning dramatic chorus.

A sharp sculpture made of thousands of pieces of jagged glass.

A giant scale model giving a sneak peek at what urban planners see for Shanghai by 2020.

The once highest point in China blends symbolic design with a kick of adrenaline.

A model solar system adds a celestial touch to this suburban park.

Originally a leper colony, the island is now an Armenian monastery that's home to an incredible manuscript library and eclectic museum.

The bombed out remains of the old church were kept intact next to the new one, as a reminder of the futility of war.

Built in the 1300s, this magnificent building that hosted England's kings and queens transports you to the Middle Ages.