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

Largest illuminated advertisement sign in the world.

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

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

A top-secret bunker now turned museum, is an eerie look at what life would have looked like in the event of nuclear war.

A ruined castle stands atop a hill surrounded by dragon lore.

This red light district plaza memorializes the Fab Four and their historic connection to the area.

Thousands of flowers create enchanting pink tunnels over the city streets.

A pair of giant stone heads represent the ancient Roman saints beheaded here.