This German art chapel is perfect for those who like their worship hard, modern, and utterly alien.

An electrical pylon under whose legs a normal gauge train can run.

Housing the groundbreaking maps and globes of Gerard Mercator.

This futuristic German television spire is actually the world's largest digital clock.

Twisted buildings adorn the banks of the Rhine river.

Scale model of St. Peter's Cathedral (Rome) in the middle of a small Dutch town.

The vast chamber inside this abandoned cooling tower looks like something out of a sci-fi dystopia.

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

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

Rare wooden escalators lead deep down into an otherwise staggeringly monotonous tiled tunnel.

Each spring, a dreamlike carpet of bluebells overtakes the forest floor.

Head underground and take a tour of the city's working sewer system, and see the underground river Senne, which defined Brussels for centuries before being covered in the 19th century.

This modern arts center is built around a gem of late-Baroque architecture.

This recently restored crypt was once plagued by liquefying coffins and exploding caskets.

Drink among marionettes at this pub inside a historic puppet theater.

Three floors of musical instruments coming from all corners of the world and hundreds of years of musical history.

From Tintin to the Smurfs, Europe's greatest graphic icons are celebrated in a grand Art Noveau gallery.

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

Burbling away in refrigerators are 105 sourdough starters from around the world.

The "stairway to heaven" lookout tower was built to resist weather, arson, and the laws of physics.

Ancient man-made caves underneath small town Belgium.

The highest point in Belgium is a staircase to nowhere.

What was once a bustling mining installation is now a bustling hub of contemporary art.

A beautiful maze marks where three countries meet.