This Belgian theme park began as a refuge for bored church children and was closed down when a boy lost an arm.

Ancient man-made caves underneath small town Belgium.

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

Tintin's creator is celebrated in an immersive museum that's an astounding work of modern art.

This bike path traverses the treetops.

An early 20th-century sanatorium, long abandoned and now being reclaimed by nature.

This museum is housed in an unassuming building that witnessed one of the most daring feats of satire in modern history.

A fascinating and enormous collection of natural history exhibits stained by a dark colonial legacy.

A whimsical bridge uses saxophones to pay tribute to two great men and the European Union.

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.

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

Petting this mysterious iron monkey supposedly brings good luck.

Explore 400,000 years of humans' "battle against darkness" in this offbeat but thorough lamp museum.

This collection of solar timekeepers includes the world's first digital sundial.

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

Dummies recreate radiological discoveries from history.

Potato-peeling mannequins, Inca art, and a dangling tuber mobile help trace the history of fries at this Belgian museum.

The Belgian library displays burned books that were salvaged from the fires of both world wars.

A fantastical bed and breakfast with magically unique rooms.

This whimsical statue dumps water on its head to symbolize knowledge flowing into his brain. Or maybe booze.

Because sometimes you need to make a batch of frites even when the stores are all closed.

A Cold War command center is hidden under an idyllic countryside.

The bronzed skull of a beheaded traitor was affixed to the city gate in the 17th century.

Museum covers every step of the chocolate-making process, from cultivation to the finished product.