University of Guanajuato. March 14-16, 2018 - enginespics
Large Sunken Patio in the Main Peralta structure.  This Chichimec Toltec civilization was here from 100 to 900 BC

Large Sunken Patio in the Main Peralta structure. This Chichimec Toltec civilization was here from 100 to 900 BC