You can enjoy the hot springs for free but a 10 minute limit at the state park. There is a great trail and go check out the bison already.Hot Springs for a cool day! If you drive through Thermopolis you can't help but stop at the official park and hot spring. If you stay the night in an RV don't miss The Fountain of Youth RV park. We stayed a day and the springs took a couple of years off I swear. The pool there is gigantic and ranges from hot to WTFarenheight! It is so big you will definitely find your happy place. I actually saw bison in the park this time around. I didn't imbibe in the dinosaur museum but I'm sure it's great. Did enjoy some craft beer downtown though. Priorities.