Ancient paintings known as the "Sistine Chapel of Cave Art."

Massive puppet-automaton machines created by French artist collective Machines de l’Ile.

Ivy-covered Medieval tunnels cut through this charming town in France's Loire Valley.

The great Italian Renaissance painter was laid to rest here in the Chapel of Saint-Hubert.

This French ghost town from World War II has been left as a memorial to German atrocities during World War II.

A tour of underground Berlin takes you through WWII air raid shelters and tunnels used to smuggle people out of East Germany.