The ancient North American city of Cahokia had as its focal point a feature now known as Monks Mound, a giant earthwork surrounded on its north, south, east and west by large rectangular open areas.

1981 Cahokia Mounds State Historic Site - Map of the inscribed property 2016 Cahokia Mounds State Historic Site - Map of the inscribed property Clarification / adopted 2016 Cahokia Mounds State ...