View of a sculpture of the head of Quetzalcoatl (Plumed Serpent) at the archaeological site of Teotihuacan, 28 January 2008. Teotihuacan -“The City of the Gods” in nahuatl language- acheived its greatest splendor between 600 BC and about 650-750 AC. AFP PHOTO/Ronaldo SCHEMIDT (Photo credit should read Ronaldo Schemidt/AFP via Getty Images)
