This seemingly humble work of art—a block of limestone—conceals a daring story and an artistic tour de force.

Cemetery honors Americans who died during WWII and is the resting place of Gen. George S. Patton.

It has an American Dream Car exhibit, Europe's largest Formula One collection, and many, many mannequins.

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

A preserved college lock-up that recalls a clubhouse approach to discipline.

A unique look into the bowels of a century-old funicular.

This Nazi-built amphitheater was constructed on a sacred mountain site used by various German cults.

The jaw of one of humankind's earliest ancestors on display at an overlooked geology museum.

This historic funicular system combines the old with the new while offering delightful views over the surrounding valley.

A collection of artworks exclusively created by the mentally ill that was almost burned by Nazi culture police.

Lines on the pillar of Heidelberg's Karl-Theodor Bridge record the dramatic heights of past floods.

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

A larger-than-life monument to the inventor of the Bunsen burner.

A small museum dedicated to the history and design of German packaging.

A well-worshipped shrine to the Virgin Mary nestled inside the last of Zagreb’s historic gates.

A house that transports visitors back to Yugoslavia.

A fantastical display of Croatian folklore, mythology, and myths.

The original location of a global franchise in Zagreb stands out for exhibits that challenge perceptions.

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.

Castle and secret tunnel withstood a siege until its owner was killed by the Holy Roman Empire, while sitting on the toilet.

Meet the oldest inhabitants of this Italian hamlet, a series of oddly preserved mummies.

The tallest church in Mechelen might have been the tallest in the world if not for a lack of funds.

Learn about stars, weather patterns, or just enjoy the panoramic view of Ghent.

A Museum of Psychiatry in a still-operating mental institution.