Definitely the Museum at College of the Ozarks, and it's a real bargain.https://www.rfostermuseum.com/Visit
I live on the water but a cpl years ago I was in Branson on a very hot weekend. We were going to SDC but it was so hot we drove further down the road and jumped in the lake! (It was 105) Indian Point had some spots to get wet and it was really an enjoyable day! Moonshine beach near the Chateau when the lake is semi normal height. Nice sandy beach with small entrance fee. Sometimes the simple stuff in a different setting is really nice.