A beautiful maze marks where three countries meet.

A former customs station on the border of Germany and the Netherlands.

This bakery and museum offers tours of the tastes and mythology of Aachen's signature spice biscuit—just don't ask for the recipe.

A distinctive former power plant turned university lecture hall looks like it could make you breakfast.

This mine is home to the largest man-made hole in Europe.

A medieval gate once used as a prison and how home to a city museum.

Largest illuminated advertisement sign in the world.

The final resting place for a wealthy Roman family, this tomb might be the best preserved of its kind outside Italy.

The body of at least one victim of a construction accident was left behind in the collapsed pylon, buried under tons of concrete.

How did a lighthouse wind up in the middle of this landlocked German city?

A poignant mural honors the heroic teenage non-conformists who took on the Nazis and paid the ultimate price.

Residing along a busy thoroughfare, this sculpture urges passersby to consider the future.

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

If the tunes of antique organs and musical marionettes don't intoxicate you, the draft beer certainly will.

An elegant chandelier hangs over this ancient sewer chamber, now open for concerts and public tours.

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

A church filled with the bones of hundreds of virgins martyrs—or so they say.

This small condiment museum makes all manner of mustards with a 200-year-old mill.