Huay Nam dung national park covers an area of Mae Taeng district, Amphoe wiang haeng, Chiang Mai and Pai Mae Hong Son province. There is a forest and nature. Steep hills wooded complex upstream the stream. Especially in the Huai Nam called foggy even more gorgeous. One of the famous Thai country. Huay Nam dung National Park has a wealth of natural beauty at DOI, the DOI Chang. DOI, three thousand