The morning views of the hot springs (82 ° C) with the mist are quite famous. There are bathing facilities for visitors including small private bungalows with mineral bath (50 THB). One of the fun things to do here as in many hot springs in Thailand is to cook an egg in the spring water. Eggs in bamboo baskets are on sale. It takes 17 minutes for a hard egg, the water is only 82 ° C. Just one kilometer away is Chae Son Waterfall, a 6-level waterfall that can be followed by a steep path and stairs. You can dip at level zero but more after.
See here a list of accommodations close to Chae Son National Park
To go visit Chae Son National Park, you can also book one of the tours above.