Pa Sak - Huay Tak UNESCO Biosphere Reserve in Lampang of Thailand is now becoming a part of the soon-to-be-official Tham Pha Thai National Park with a massive area covering 5 districts including Ngao, Mueang, Chae Hom, Mae Mo, and Wang Nuea of Lampang. This is a place one can find the world's best varieties of teak trees preserved and grown into their full glories. Those into natural attractions will have a field day chasing waterfalls, exploring caves, and being amazed by prehistoric paintings.