As of 1979, Boudha Stupa is a UNESCO World Heritage Site. Along with Swayambhu, it is one of the most popular tourist sites in the Kathmandu area.The first stupa at Boudhanath was built sometime after AD 600, when the Tibetan king, Songtsen Gampo, converted to Buddhism. In terms of grace and purity of line, no other stupa in Nepal comes close to Boudhanath. From its whitewashed dome to its gilded tower painted with the all-seeing eyes of the Buddha, the monument is perfectly proportioned. Most of the tourist come to visit here.