A beer pipeline runs beneath Bruges.

Each time a baby is born in Ghent, these streetlights flash in silent celebration.

An open-air sewer system that was covered piece-by-piece over 300 years.

This narrow Ghent alleyway is an officially sanctioned street art tunnel.

Descend into the tunnels to experience the life of a coal miner.

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

Somewhere there is a giant who can no longer poop, but now travelers can stay inside his anus.

Brussels' favorite peeing boy has a sister.

A little sculpture with a large wardrobe.

Cozy basement bar sports an inventory of over 2,000 beers.

This fairytale castle was built as a show of power but was nearly torn down thanks to its history of torture.

The big toe of this towering monument to a Croatian national hero is worn from years of superstitious rubbing.

Island wonderland for communist autocrats.

One of the best-preserved Roman amphitheaters is still used today, but for less brutal events.

When a supermarket opened up shop within a medieval building it became protected by UNESCO on a technicality.

A musical instrument played by the sea.

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

A whimsical bridge adorned with decorative dragons.

This one-time health resort was used by aristocrats around the world.

This massive subterranean fissure is known as the "underground Grand Canyon."

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