A marble Lucifer hides behind the pulpit of this Gothic cathedral.

This statue was given to France by the United States to commemorate the centennial of the French Revolution.

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

Rotterdammers' dirty minds gave this Santa a dirty nickname and cursed it to a life of wandering.

The former home of a trailblazing surrealist is still filled with haunting dolls and grim paintings.

Petting this mysterious iron monkey supposedly brings good luck.

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

Hiding the longest subterranean river known in the world.

France's most famous cemetery, with some of its most curious tombs.

A miniature city, once ruled by the Queen of the Netherlands.

Climb inside an iron crystal magnified 165 billion times its normal size.

A little sculpture with a large wardrobe.

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

Historic medieval fortified city in southwest France.

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

Brussels' favorite peeing boy has a sister.

Incredible labyrinth of man made caves.

This ghost town in Belgium will lose its street art when it ceases to exist.

Colorful and chaotic stacked hotel in North Holland.

360° views of the city plus five floors of optical illusions and hands-on science.

A beautiful maze marks where three countries meet.

A 18th century graveyard and its astonishing cortege of macabre iconography.

This modest marker near Notre Dame identifies the very center of Paris.

This fairy tale forest hides scenes from some of the more obscure and bizarre Western nursery stories.