An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

A mechanized clock where a man fights off a dragon, crab, and rooster.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

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

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

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

A little sculpture with a large wardrobe.

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

A visionary precursor to the Internet made of index cards.

A 141-foot wave of crashing lumber guards the entrance to the Grand Place in Mons.

Petting this mysterious iron monkey supposedly brings good luck.