Situated on the peak of Nang Non Range, the Chang Moob area is 1,500 meters above sea level. It has a cool climate year-round, and was once the largest opium growing area and a major drug trafficking route in the region. Because of this, forest land was completely destroyed. Today, the area has been transformed into an arboretum where native flora and rare species are grown alongside rhododendrons from different countries. Sorrel Himalayan Cherry (Prunus cerasoides D. Don) and such native orchids as lady’s slipper (the subfamily of Cypripedioidea), are grown in the natural environment amidst a forest of pine trees. The arboretum has paths that wind down the mountain slopes, leading to rest areas and panoramic views overlooking the distant topography of Thailand’s neighboring countries on the other side of the Mekong River.
- Doi Tung Royal Villa, Chiang Rai province, was the former residence of HRH Princess Srinagarindra, the Princess Mother. This was also the base for her work with the Doi Tung Development Project, which she founded to reforest the land and helped to improve the lives of the local ethnic minorities who had previously relied on slash and burn farming, opium poppy cultivation and the drugs trade.
- The Mae Fah Luang Garden is a beautifully landscaped garden and tourist attract which is part of the Doi Tung Development Project. It is located on 10 acres of land that was originally the Akha village of Pa Kluay, part of an important route for opium caravans and those involved in heroin-related trafficking and weapons in the past.
- The Hall of Inspiration is an interactive exhibition space that covers the life and achievements of the members of the Mahidol family: His Royal Highness Prince Mahidol, Her Royal Highness Princess Srinagarindra the Princess Mother, Her Royal Highness Princess Galyani Vadhana, His Majesty King Ananda Mahidol, Rama VIII, and His Majesty King Bhumibol Adulyadej, Rama IX.