Angel Mounds State Historic Site (Visit this link)
Nationally recognized as one of the best preserved prehistoric Native American sites in the United States. From 1100 to 1450 A. D., a town on this site was home to people of the Middle Mississippian culture, who engaged in hunting and farming on the rich bottom lands of the Ohio River. Several thousand people lived in this town protected by a stockade made of wattle and daub.
http://www.angelmounds.org