This should be on the “bucket list” of anyone interested in America before the Europeans. It is an enormous prehistoric city across the river from present-day St. Louis. Even though much has been lost through carelessness, development, and the ravages of time, there is still much to see, do, and learn from this remarkable place.
Here’s an older video from the Interpretive Center that gives a nice overview. I can’t wait to get back to Cahokia. New mysteries are discovered every year.