This past weekend I traveled south of Brownville, Nebraska to visit Indian State Park. The prehistoric petroglyphs are easy to spot along the cave wall. Though, there are years and years of graffiti that cover the wall and I would speculate that many of the prehistoric images have most likely been defaced.
I am still searching for more information on this site. I would tend to think that someone or university would have possibly done excavation around this area. I do hope that I still may come across such information.
However, it is a beautiful park and there are ruins of a town that existed in the mid 1800’s. The town has an interesting history and the cemetery is located in the park as well. It is worth a drop in visit if your ever in the area!