Saturday, July 19 - In the morning we toured Jewel Cave National Monument, currently the second-longest cave system in the world. It may well pass up Mammoth Cave in Kentucky, since based on airflow out of the cave, they may have only mapped 2-5% of the passages!We spent the afternoon doing laundry and relaxing around the campground. That evening we watched the lighting ceremony at Mount Rushmore which was very inspiring (despite the ranger with her elementary school teacher style of talking s-l-o-w-l-y about how the four presidents portrayed were known for taking "risks.")
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