The Indian Cave Trail takes users to a cave exhibiting 1500 year old petroglyphs. Located in a mountainous area of Nebraska, this reverse lollipop trek made up of grass and dirt provides challenges like steep climbs, muddy terrain, and tricky descents (route back to trailhead is more challenging). Permits are required for entry, along with a day fee - contact Indian Cave State Park for more information. There is a shuttle option if one has two vehicles, or, after reaching the cave, one can simply travel back to the trailhead on a park road instead of reversing back on the trail.