Ocmulgee Mounds National Historical Park

Ocmulgee Mounds National Historical Park (formerly Ocmulgee National Monument) in Macon, Georgia, United States preserves traces of over ten millennia of culture from the Indigenous peoples of the Southeastern Woodlands. Its chief remains are major earthworks built before 1000 CE by the South Appalachian Mississippian culture (a regional variation of the Mississippian culture.) These include the Great Temple and other ceremonial mounds, a burial mound, and defensive trenches.

Source: Wikipedia — Ocmulgee Mounds National Historical Park (CC BY-SA 4.0)