It's the site of many of the most architecturally significant Mesoamerican pyramids in N. America.
These are not built of solid stone like the Egyptian pyramids. ... rather, rubble covered with cut stone.
In its heyday, this city came to be the largest and most populated center in the New World.
Teotihuacanos practiced human sacrifice: human bodies and animal sacrifices have been found during excavations of the pyramids at Teotihuacan. Scholars believe that the people offered human sacrifices as part of a dedication when buildings were expanded or constructed. The victims were probably enemy warriors captured in battle and brought to the city for ritual sacrifice to ensure the city could prosper. Some men were decapitated, some had their hearts removed, others were killed by being hit several times over the head, and some were buried alive.