Wat Phra That Doi Tung is situated on top of Doi Tung Mountain, the highest mountain in Chiang Rai Province with an elevation of approximately 2,000 meters, about 50 kilometres south of Mae Sai town which is near the Myanmar border. The temple can be reached via a 40-kilometre mountain road which meanders along the mountainside. The journey is worthwhile as the panoramic views into Laos and Myanmar at the peak are spectacular.
Wat Phra That Doi Tung was constructed in the 10th century and was renovated by Chiang Rai's most famous ruler King Mangrai during the 13th century and by the famous Chiang Mai monk, Khru Ba Siwichai, at the turn of the 20th century.
The temple complex is comprised of twin Lanna style reliquaries one of which is said to contain the left collarbone of the Lord Buddha. Throughout the year, the holy relic draws devout Buddhists from all over Thailand, Laos and Myanmar.