Need to stop if in the Black Hills!
Hot Springs is a quaint little town with lots of natural cool and warm springs. Several wading and sitting areas in the local springs. In town there is a great park called Brookside Park that has a great wading area, bathrooms, and plenty of parking. If you have time drive 16 miles out of town to a roadside stop of Cascade Springs to dip in the cool pools and the main attraction Keith Memorial Cascade Falls. If going to the falls get there early, parking lot fills up fast!
https://www.fs.usda.gov/recarea/nebraska/recarea/?recid=30329
Month of VisitAugust