The remains of an ancient Roman city are hidden underneath Bologna's beautiful public library.

A masterpiece of modern architecture that caused quite a stir in Paris, recreated in Bologna half a century later.

An extraordinary collection of 18th century anatomical waxworks.

The attic of a four-century-old canal house hides a clandestine church.

An Amsterdam street lined with antique shops each one dedicated to a different obscure collection.

Microscopic scenes; some call it novelty, some call it art.

This bar and museum are devoted to the controversial comic book work of Kája Saudek.

This massive library holds what was once the largest book collection in the world.

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

Lyon's "Wall of the Silk Weavers" is one of the largest murals in Europe.

A wonderfully kitsch bookstore the size of a supermarket.

A little sculpture with a large wardrobe.

This banal Parisian entranceway is not what it seems.