For an unique natural experience, plan an excursion to the bubbling pools of Thung Theewii Hot Springs. This place is known for its mineral-rich thermal waters.
If you're trying to figure out what else there is to see after you've visited Thung Theewii Hot Springs in Wiang Pa Pao, you have loads of choice. Drop by Wat Pa Pao. It's not far from the naturally heated water source and offers another insight into what this area is all about.