It's said the devil used this mushroom rock as a table for a late-night meal.

A university observatory dome painted to resemble the beloved 'Star Wars' droid.

A former ironworks that was the first UNESCO industrial site.

The birthplace of Karl Marx is now a museum dedicated to the communist revolutionary's life and work.

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

The bones of the Biblical Magi traveled to Constantinople and Milan before landing in their current home inside an elaborate golden reliquary in the Cologne Cathedral.

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

It's good luck to be mocked by this monkey.

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

Aged nearly 1,700 years, the world's oldest bottle of wine is probably still drinkable.