The Cahokia Mounds are remnants of the Indian tribes that lived in this part of Illinois. Really, they look like big hills. When I was a day camp counselor this was a standard field trip. You drive out and park near a mound (there's not much else in sight) and walk a little way to it. Then you climb a LOT of steps. If you have younger children with you, they run ahead and ask why you are going so slow or ask if they REALLY have to climb ALL of them. Once at the top there is a nice view of the area. We only stayed up there a few minutes. Then back down the steps and the short walk back. ALL the kids were complaining toward the end of going down the steps. There is very little shade, only a few trees near the parking area, therefore this can be an extremely hot excursion. It may be better in spring or fall. The interpretive center is nearby and is air conditioned. After a few minutes of relief, then you notice they do have some interesting exhibits on the artifacts found near the mounds and their history.