We started out our day taking a tour of Wind Cave in southwestern South Dakota. The tour took us 800 ft. into the Earth. Wind Cave is one of the most complex cave systems in the United States. Cave temperature was a cool 59 degrees F. The next task of the day was to drive to Badlands National Park. The 3 hour trip went quickly with construction popping up here and there. Upon arrival, we spent an hour touring the Park, Visitors Center, and Gift Shop. When we exited this Park it was our last National Park stop on the WFS trip. The bus made its way east along the very flat Interstate Hwy 90. Around 8:00pm we stopped at Chamberlain, SD for dinner. Everyone was treated to pizza, soda, and music. It was a great way to spend one of our last night together. The day was still not complete, as the big yellow bus continued east. Day 31 ended at about 3:15am at a wayside in Minnesota. It was a great day!!