1950 vintage postcard. A Sacred Well of Sacrifice at Chichen Itza in Yucatan, Mexico. The Sacred Cenote is a water-filled sinkhole in limestone at the pre-Columbian Maya archaeological site of Chichen Itza, in the northern Yucatán Peninsula. According to both Maya and Spanish post-Conquest sources, pre-Columbian Maya deposited valuables and human bodies into the cenote as a form of sacrifice to the rain god Chaac.