Lascaux cave paintings (c. 18,000 bc), replica from Lascaux International Center for Cave Art, Dordogne, France. Photo: Rick Steves’ Europe.

Rick and the Jockey of Artemision (150 to 140 bc), at the National Archaeological Museum, Athens. Photo: Rick Steves’ Europe.

Laocoön (c. first century bc), Vatican Museums, Rome. Photo: Rick Steves’ Europe.