Located in the mountains of northern Thailand, Doi (mountain) Khuntan national park is home to many interesting species of flora and fauna as well as historical places. One of its distinguished feature is the Thailand's longest railroad tunnel (Khun Tan tunnel), which is 1,352 meters long. Doi Khuntan National Park contains the mountains straddling Lamphun and Lampang provinces. Established in 1975, it is the 14th national park in Thailand.