What a terrific way to spend a day or just a couple of hours. Paths are well marked and the park’s staff in the visitor center is very helpful. There are amazing views of the Illinois River and the canal at Utica and beautiful sedimentary rock formations. This was worth the short drive from the resort and is free. There is the requisite gift store and snack counter, or choose to just sit and watch the river. Some trails require stairs to ascend to the viewpoints, but the view is worth it.