Skeletons, medical artifacts, and other obscure and precious treasures all displayed in a wooden pharmacist's cabinet.

This demon atop the Notre-Dame de Paris looks utterly bored.

A melancholy jester sits on the grave of a famous 20th-century ballet dancer and choreographer.

A reproduction of the famous prehistoric cave paintings is hidden underground at the National Archaeological Museum.

Step inside an ancient beehive tomb built for a mysterious cult hero.

Poseidon? No one seems to know.

Seventeen oak trees sprout from the roof and walls of this tiny chapel without any visual evidence of roots.

The ruins of an ancient Roman tomb hidden in the basement of a trendy clothing store.

This ancient hydrological marvel is now the base of a modern outdoor cinema.

A Bronze age settlement on the Greek island of Santorini might have been the inspiration for Plato's Atlantis.

No one knows who built this strange cave of worship or exactly why.