Skulls on wall of Tzompantli, Chichen Itza, Yucatan, Mexico. © 2018 Kenneth R. Sheide

Ball court target at Chichen Itza, Yucatan, Mexico. © 2018 Kenneth R. Sheide

Designs in lower wall of ball court. Chichen Itza, Yucatan, Mexico. © 2018 Kenneth R. Sheide