 Its construction is staggered, four platforms built with stones and clay, building four platforms, most interesting are the bas-reliefs decorating the bottom of the south wall of the lower body, called sculpture gallery, every stone contains figures with motion, there are not two the same and complete in varied positions.According to Ignacio Bernal hypothesis, these represent ballgame players whose position reveals movement, probably were placed during a reconstruction of the platform, reason there does not seem to be any arrangement.The structure is a large platform built against the west-facing hillside and has about 35 bas-reliefs carved into the southern side of its lower wall.