This Luxembourg cave is covered in cryptic looking marks left by mining activity.

An expansive complex of subterranean tunnels is all that remains of one of Europe's most formidable medieval fortresses.

This noble mash-up in eastern Luxembourg is part Medieval, part Renaissance, all castle.

This tri-part waterfall is a little bit of fairytale beauty in the heart of Luxembourg's Little Switzerland.

Once the local rulers had gone these enchanting ruins housed common folk in an almost real life fairy tale.

You would never come across this tiny green oasis if you didn't know it existed.

You can spot this teeny tiny stained-glass window from the Bonifacius bridge.

This former Masonic lodge has been transformed into part museum, part bar, all awesome.

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

Christ's blood preserved in a Belgian town.

An unsettling sculpture of a boy hanging out in a street in Ghent has been baffling visitors for years.

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

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

A shining memorial to a Belgian hero is said to bring luck to anyone who touches it.

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.

Only museum in the world devoted to bookbinding and book arts holds a permanent collection representing five centuries.

Brussels' favorite peeing boy has a sister.

When you're a great Russian Tsar, even your vomit gets a statue.

A fantastical 13th-century fortification sandwiched by a modern hotel in central Brussels.

A little sculpture with a large wardrobe.

Meet the bronze beloved pet to a family of famous peeing statues.

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

Theme park featuring miniature replicas of European monuments.

This collection of over 50 murals celebrates Brussels' rich history as the self-proclaimed home of the "comic strip."