Depart Chiang Mai for Doi Inthanon National Park to see Thailand’s highest mountain in the tropical forests south of the city. Go to the highest peak for a panoramic view and pay your respects at the shrine of King Intharawichayanont. Next, enjoy a short hike along the Angkha Natural Trail. See the twin stupas that commemorate the birthday of King Bhumibol and Queen Sirikit. Go to a local market of the Hmong hill tribe before visiting the Royal Agricultural Research Center, set up to support local projects in place of opium farming. After lunch at the centre, explore the Karen hill tribe village of Mae Klang Luang and get a stunning view of the Vachiratharn Waterfall.