The largest mosque in Germany.

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

Featuring the last fully walkable parapet walkway in Europe.

How one woman gave orphaned sculptures a new home in the city of Utrecht.

The ruins of a castle sat decaying in this park for years before a massive renovation restored this area to its past beauty.

A 14th-century fortified keep showcases the masterpieces of an ingenious 20th-century clockmaker.

This neighborhood of futuristic ball houses looks like an alien settlement in a science fiction film.

A unique World War II memorial commemorates where the American B-17 bomber Man-O-War crashed.

Take a stroll through the hellish grotesques of Hieronymus Bosch in this elaborate Netherlands church.

Be it nature, art, or abandoned military architecture this eclectic German "museum" has you covered.

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

The world's first floating farm is staffed by one human, three robots, and 35 cows.

Wind power station for making famous Ketel One vodka.

The bridges portrayed on EU currency aren't fictional anymore.

This unique sculpture proved invaluable when it saved a train from careening off the tracks.

Peek through a transparent pyramid and drink in the mountain made of books.

A monument hidden in the woods built in 1938 as a getaway for a Dutch museum curator.

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

The highest point in Belgium is a staircase to nowhere.

Walk or bike along a narrow strip of Belgium sandwiched by German territory.

This may be the world's only drive-through windmill.

This hidden gem in Arizona is truly worth the rugged journey.

This mesmerizing and surreal landscape features intricate patterns of white and red sandstone.

An ancient passage filled with stalls selling used books, once frequented by Vincent Van Gogh.