Op Luang National Park woodpecker, pheasant and partridge. 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. 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. Prehistoric paintings and other artefacts have been found in Op Luang National Park. The Doi Pha Chang area has a cliff painting of
Doi Kham additives. Their products do not contain preservatives or artificial flavors. Doi Kham Food Products is a private limited company. In recent years it has been profitable. In 2016, the firm had revenues of 1.82 billion baht. Projections for 2017 and 2018 are 2.07 billion baht and 2.4 billion baht. Doi Kham employs total of 200 persons including five engineers and five quality assurance staff. Doi Kham has processing plants in Fang District, Chiang Mai Province; Mae Chan District, Chiang Rai Province; and Tao Ngoi District, Sakon Nakhon Province. The company has 34 retail shops nationwide. Doi Kham The Doi Kham