Aztalan State Park

Aztalan is believed to have been first settled around 900 by a Native American culture referred to as the "Middle Mississippian Tradition". The most famous example of a Middle Mississippian settlement is at Cahokia, Illinois. These settlements are characterized by the construction of mounds, stockades, and houses, by decorated pottery and agricultural practices. There are also elements of the Woodland culture found here.

The residents were involved in far reaching trade. Some of the items found include copper from Michigan's Upper Peninsula, shells from the coast of the Gulf of Mexico, and stone from other areas of the Midwest.

Sometime between the years 1200 and 1300, the Aztalan settlement was abandoned for reasons that remain unknown to this day.
www.dnr.state.wi.us/org/land/parks/specific/aztalan/