Black and white lantern slide of the excavated terrace of the Cholula Pyramid site.

Black and white lantern slide of the Cholula Pyramid site, looking south.

Black and white lantern slide of the Cholula Pyramid site, with a 132km marker next to the road side.

Black and white lantern slide of the unexcavated site of the Cholula Pyramid, with the Nuestra Senora de los Remedios Church in the background.

The ancient city of Teotihuacan is the most visited of Mexico's archaeological sites. Pyramid of the Sun, the largest building in Teotihuacan, found along the Avenue of the Dead, in between the Pyramid of the Moon and the Ciudadela. It is the third…

The ancient city of Teotihuacan is the most visited of Mexico's archaeological sites. Temple de Quetzalcoatl, the third largest pyramid in Teotihuacan, is known as the Feathered Serpent.

The ancient city of Teotihuacan is the most visited of Mexico's archaeological sites. Pyramid of the Sun, the largest building in Teotihuacan, found along the Avenue of the Dead, in between the Pyramid of the Moon and the Ciudadela. It is the third…

The ancient city of Teotihuacan is the most visited of Mexico's archaeological sites. Temple de Quetzalcoatl, the third largest pyramid in Teotihuacan, is known as the Feathered Serpent.

Ruins of the Temple of the Feathered Serpent at Teotihuacan.

Ruins of the Temple of the Feathered Serpent at Teotihuacan.

Ruins of the Temple of the Feathered Serpent at Teotihuacan in Mexico.

Ancient ruins at Xochicalco near Cuernavaca.

Pyramid of the Sun at Teotihuacan.

Detail from the Temple of the Feathered Serpent at Teotihuacan.

Detail from the Temple of the Feathered Serpent at Teotihuacan.

View of Pyramid of the Sun at Teotihuacan from base.

Sitting on the snakehead carvings at Chichen Itza.

Sitting on the snakehead carving at Chichen Itza.

Pyramid of Chichen Itza is a large pre-Columbian archaeological site in Yucatan, Mexico built by the Mayan civilization.

The facade of the Featherd Serpent Pyramid at Teotihuacan.

Tzompantli or "skull platform" associated with the Toltec culture. This structure was most likely used for the storage of heads of captives or sacrificial victims.

Stone carving at one of Mexico's ancient ruins at Chichen Itza.