Phu SOI DAO National Park, an area of 149,It covers an area of 375 Rai of Amphoe ban khok, Nam finishing chat trakan district and uttaradit, Phitsanulok has been declared as a National Park. 1994 geography consists of high mountains along the Thai-Lao border. 2,102 m from sea level. Its highest mountain is forest covered mountain forests and pine forests, such as switch grass and pine forest three leaf. Cold weather almost all year round, such as various species of flowers and flowers which crowned; National Park can be visiting throughout the year, but if he wants to look out the beautiful colors of flowers are usually intended to get moisture during the rainy season should come in late winter rain