Final resting place of the humble physicist who discovered X-rays, and made the invisible visible.

A 13th century fortified house built to defend the Duchy of Burgundy.

One woman's decades-long obsession with the "La Fée Verte."

The largest ice cave in the world is thought to be the entrance to hell according to Austrian legend.

Before this bridge was built people had to wait for the ferryman, an annoyance that, the story has it, gave the town its name.

A small park on Bourbon Street features life-size bronze statues of New Orleans musicians.

The most visited, and possibly most controversial, museum in Germany.

A Neolithic burial site erected around 3000 BC.

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

A museum and shop on Bourbon Street located in the French Quarter.

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.