The country's highest mountain, Doi Inthanon is one of the big names to tick off the list on any Thai trip. On this small group tour, you'll journey to the namesake national park to visit Mae Kland and Wachiratharn Waterfalls, the twin Chedi towers, and the mountain summit – a cloud-piercing peak known as ‘the roof of Thailand' thanks to its incredibly Instagrammable views.