Op Luang National Park

Op Luang National Park () is a national park in Chiang Mai Province, Thailand. It is home to a scenic river canyon, waterfalls, and caves.
Geography.
Op Luang National Park is about south of Chiang Mai in Chom Thong, Mae Chaem and Hot Districts. The park's area is . It is contiguous with Doi Inthanon National Park. Like Doi Inthanon Park, Op Luang is in the Thanon Thong Chai Range.
History.
Prehistoric paintings and other artefacts have been found in Op Luang National Park. The Doi Pha Chang area has a cliff painting of an elephant. Near Op Luang Canyon there are more rock paintings, as well as ancient jewelry and tools. Carbon-dating has indicated these relics to be about 28,000 years old.
The park was a forest park from 1966 to 1991. In 1991 Op Luang became Thailand's 68th National Park.
Attractions.
The park's main attraction is Op Luang Canyon, carved out by the Mae Chaem River. The canyon is steep-sided and about long.
Waterfalls include Mae Bua Kham, about high; Mae Chon, about wide and the year-round Mae Tia about high. Thep Thanom is a hot spring in the west of the park.
Tham Tong is a granite and limestone cave leading to long tunnels. Tham Tu Pu cave features stalagmites and stalactites.
Flora and fauna.
The park features forest types including mixed deciduous, deciduous dipterocarp and evergreen. Tree species include "takian", "Dipterocarpus alatus", "Xylia xylocarpa", teak, "Pterocarpus macrocarpus", "Toona ciliata" and "Lagerstroemia speciosa" as well as various bamboos, palms and ferns.
Animal species include tiger, sambar deer, Asiatic black bear, civet, pangolin, macaque, Siamese hare, serow, langur, mongoose, tree monitor, northern treeshrew, barking deer and wild boar.
Avian life includes vernal hanging parrot, scarlet minivet, white-rumped shama, spotted dove, coucal, hill myna, Siamese fireback, red junglefowl, shikra, falconet, bulbul, woodpecker, pheasant and partridge.