I took a short walk on a boardwalk behind the visitor center and arrived at the entrance to the cave. A good-sized creek ran right into and disappeared inside the cave. In the past, the creek would flood and eventually gouge out a larger cavity. The ceiling of the structure from time to time would split from the upper sandstone, causing a rockfall, which in turn created a raised floor in a large portion of the cave. Thus, Native Americans could live in the cave. It had natural air-conditioning and a ready water supply.
I noticed as I entered the cave that hundreds of large screws with plates had been driven into the ceiling to prevent any further rockfalls- or so the theory goes.
At the visiting center, I learned the unique feature of this cave is that various research groups had excavated artifacts which could demonstrate almost 10,000 years of habitation by Indians of several periods: Archaic, Woodland, and Mississippian.