Sri Sungwan Waterfall is located in Pha Daeng National Park, around 20 km from Chiang Dao. If it is not impressive by its height, it is a nice place to relax and refresh. And the waterfall is charming. You have the right to bath in the waterfall even if in the different levels, the water is rather shallow, it allows to splash a little and should please the children and the adults who want to refresh. There is also a small flower garden (only interesting in the blooming season of flowers) and a few little trails to do.
Caution during the dry season, the waterfall will probably be dried out. Except at the very beginning of the dry season. So check out before you go.