American Indians and vendors of Indian-made items will sell crafts, art, jewelry, beadwork, clothing, baskets and more. Shop for unique holiday gift items. Friday, Noon-5 pm; Saturday 9-5, and Sunday, 9 am to 4 pm. Free.
For those unfamiliar with this spectacular archaeological site: Cahokia Mounds, located just across the river from St Louis, Missouri was one of the greatest and largest cities on Earth during its heyday by the 13th century. For various reasons including disease, much of the Mississippian culture was in collapse by the time of European expansion in the 16th-18th centuries.
If you have any interest at all in late prehistoric North America, this site is a must see.