In the four years that we lived in the Rapid City area (some 40 years ago) we never made it out to the Badlands. It didn't sound appealing to us then. But we are much older now and we found them to be fascinating.
Look closely in that dark area in about the center of this picture. You can see a mountain goat resting in the shade. What you can't see is her two babies just out of sight to the left on their own ledge.
Here is another one. We stopped as she crossed the road. There were several more on either side of the car. This reminded us of the animals approaching our car during our trip to Yellowstone several years ago.