The falls & fossil bed part were free, but there is a charge for the interpretive center. Showed a short movie about how it was formed. The museum is a little worn. I did see plans to expand new exhibits , that will be nice. The gift shop needs updating. We stayed about an hour. They do have a nice walking path through the park.
Tip: up the road about 2 miles is George Rogers Clark cabin he built on the banks of the Ohio.Go see it while in the area.
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