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

A museum and shop on Bourbon Street located in the former home of the second Voodoo Queen of New Orleans.

This symbolic piece of New Orleans architecture is also home to a few ghastly stories.

A 200-year-old bar in the historic French Quarter refuses to give up its place in history, nor its role in securing ours.

This church sits upon a peaceful hill and a long, turbulent history.

The northernmost point in Denmark is a turbulent sandbar created by two clashing seas.

France's Lilliputian park displays over 100 of the country's monuments for visitor perusal.

In this truly magical place, rent hasn't been raised since the year 1520.

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

Super-heavy Nazi architectural experiment.

The largest bell in the world has been swinging high above a Cologne cathedral for almost a century.

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

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

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

Sitting in the basement of a castle, the largest wine barrel in the world is bigger than most apartments.

Metro station with a claim to rock n' roll fame.

The prototype for all Nazi concentration camps.

Copenhagen's celebrated theme park and gardens.

The second oldest continuously operating bar in Louisiana.

The oldest cemetery in New Orleans, resting peacefully for over 200 years now.

The world's most important buildings shrunk to a tiny size.

Despite centuries of architectural innovation, this French castle is being built like it's the 13th century.

This modern French ossuary contains the jumbled bones of 130,000 WWI soldiers.

Once one of the world's great cities, Cahokia was a place of religious worship, trade and mass human sacrifice before being mysteriously abandoned.