A Chac Mool is a very specific type of Mesoamerican statue associated with ancient cultures such as the Aztecs and Maya. The statues, made of different types of stone, depict a reclined man holding a tray or bowl on his belly or chest.

Spanish observers reported the great quantity of human sacrifices during important ceremonies at the Great Temple and the chacmool was probably used during these rituals to symbolise the sacrificed captives as well as receive their blood. The discs gripped by some chacmools may represent a mirror.

Chac, Mayan god of rain, especially important in the Yucatán region of Mexico where he was depicted in Classic times with protruding fangs, large round eyes, and a proboscis-like nose.

Chac Mool is originally described as a stone statue with red sauce smeared over the belly. As the story continues his physical appearance begins to change, becoming more and more human like. He loses the stone exterior and begins to develop the yellow skin of a native.