In Amphoe Meuang Pan, about halfway between Wang Neua and Lampang, is the 593-sq-km Chae Son National Park . Elevations in the park reach above 2000m. Jae Sawn has six drops, each with its own pool; close to the falls are nine hot springs. Small huts house circular baths, recessed into the floor and lined with clay tiles, that are continuously filled with water direct from the spring. For 20B you can take a 20-minute soak, preceded and followed by an invigorating cold-water shower.