Jiuzhaigou Ravine is in Nanping County, Aba Tibetan-Qiang Autonomous Prefecture. The mountains, lakes, natural primeval forest and unique scenes make Jiuzhaigou a fairyland. Mountains ragging 1,980 to about 3,100 meters in height are covered by a variety of trees and plants such as green conifers, luxuriant broadleaf trees and colorful rare flowers and grasses. Scenes change according to the season and the area is particularly colorful in autumn. In 1992 it was listed as a world heritage site.