Last photo from our recent excursion to Cahokia Mounds. Cahokia Mounds is a UNESCO World Heritage Site, and is the largest pre-Columbian settlement north of Mexico. It was occupied primarily during the Mississippian period (800–1400), with a population of 10–20,000 at its peak between 1050 and 1150.
According to the internet, "Twin Mounds" are the largest of several sets of paired mounds, each with a rectangular and a conical mound.
It is believed that these mounds might be part of a mortuary complex, with the platform mound for "preparation" and the conical mound for burial.
