At our visitors' suggestion, we went to a place we had never visited. We had read about Cave Falls, which is located at the southwest corner of Yellowstone NP. The access to it is from the Idaho side, so is not visited by very many. It was definitely worth the trip.
More aspens, which can vary in color from pale yellow to bright orange and all shades in between.
The next few shots are self explanatory, as we take a walk up to the base of the falls. According to what we read, there was supposed to be a cave there, but a recent rock slide appears to have covered the entrance.