Huanglong sets within the Songpan County’s mountains, with lush green forests surrounding the unique limestone rock formations which are internationally renowned as being one of the world’s largest, undamaged karst landscapes. Huanglong is famous for its "Four Wonders," the colorful pool, snow mountain, canyon, and forest. In 1992, it was listed on the World's Natural Heritage List. Located as the transitional area between Sichuan Basin and Qinghai-Tibet Plateau, Huanglong is famous for a good variety of vegetations from a mixed forest of evergreens and deciduous broadleaf at the mountain foot with an elevation of 2000 meters above sea level, mixed broadleaf and conifer forest, subalpine coniferous forest, to alpine shrubs and meadow at the higher part of the mountain with an elevation of 3800 meters. For plant tours, Huanglong is extremely famous for alpine flowers, especially several species in the orchid family.