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Avenue of the Dead
The Avenue of the Dead is the main street that cuts through the center of the archaeological site.
Stonework at the site includes images of Quetzalcoatl, the feathered-serpent deity of ancient Mesoamerican culture.
Teotihuacan's stonework is intricate, indicating the civilization's high degree of sophistication. However, the civilization collapsed sometime during the 7th or 8th century. The exact reason is unknown.