One of three major national parks close to Chiang Mai, along with Suthep and Inthanon, DOI KHUN TAN NATIONAL PARK is easily accessible by train from Chiang Mai: a 1352m-long rail tunnel, the longest in Thailand, built between 1907 and 1918 by German engineers and Thai workers (of whom over a thousand died due to accidents, malaria and tigers), cuts through the mountain that gives the park its name. Despite this, and the fact that the king has famously holidayed here, the park remains unspoiled, but has enough infrastructure to encourage overnighting. The park is most popular on weekends, when groups of Thai schoolchildren visit, and during the cool season.

Covering 255 square kilometres, the park’s vegetation varies from bamboo forest at an altitude of 350m to tropical evergreen forest between 600m and 1000m; the 1373m summit of Doi Khun Tan is known for its wild flowers, including orchids, gingers and lilies. Most of the small mammal species in the park are squirrels, but you’re more likely to see some birds, with over 182 species found here.

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