Si Sachanalai National in Park was proclaimed a national park on 8 May 1981. With a total area of 213 square kilometres . in Amphoe Si Satchanalai and Amphoe Thung Saliam of Sukhothai Province, Si Satchanalai National Park offers trekking routes through waterfalls and caves. There is Tad Dao Waterfall, originated from the Tha Pae stream. The 30-meter-high fall is wonderful, ideal for rest and relaxation