Copley / ​ age fotostock; Mayan observatory: El Caracol (The Great Conch) (photo), Mayan / ​ Chichen Itza, Yucatan, Mexico / ​ Giraudon / ​ The Bridgeman Art Library
Copley / ​ age fotostock; Mayan observatory: El Caracol (The Great Conch) (photo), Mayan / ​ Chichen Itza, Yucatan, Mexico / ​ Giraudon / ​ The Bridgeman Art Library