The last bastion of Roman presence north of the Alps looms over a German town.

Thousands of tourists and residents in Cologne affix "love padlocks" on the Hohenzollernbrücke Bridge to symbolize their affections.

This Dresden church was purposely rebuilt Protestant after being demolished in World War II.

This abandoned coliseum was intended to be a grand Nazi rallying ground before it was halted at the end of the war.

Hamburgers are intensely proud of their tunnel beneath the river.

A castle from the Holy Roman Empire that hosts traveling youth... in its stables.

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

The prototype for all Nazi concentration camps.

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

A sprawling Baroque park with 300-year-old hydro-pneumatic waterworks.

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

A bronze statue of the fictional character nicknamed "Mrs. Hat" from a beloved Belgian comedy.

In the shadow of a former battleground, the resting place for nearly 2,000 soldiers who died in World War I.

What was once a bustling mining installation is now a bustling hub of contemporary art.

This memorial museum chronicles the apocalyptic destruction of the First World War.

This giant urban staircase was built to keep the city's brave fighting men from getting waylaid in the red light district.

A maze of crosses marks the jumbled divide between the Netherlands and Belgium.

This sprawling Belgian fort was once thought of as impenetrable but now it is simply an abandoned relic.

A little sculpture with a large wardrobe.

Cozy basement bar sports an inventory of over 2,000 beers.

This collection of over 50 murals celebrates Brussels' rich history as the self-proclaimed home of the "comic strip."

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

Climb inside an iron crystal magnified 165 billion times its normal size.

This Transylvanian church has changed its denomination four times.