Mounds from Pre-Colombian Native American city (Mississippian culture) located in Collinsville, IL, near St. Louis, MO.  Dates to 1050-1350.  Added to list of UNESCO World Heritage Sites in 1982.
Mounds from Pre-Colombian Native American city (Mississippian culture) located in Collinsville, IL, near St. Louis, MO.  Dates to 1050-1350.  Added to list of UNESCO World Heritage Sites in 1982.