A beautiful deep valley in Heshui County, Aba Tibetan and Qiang Autonomous Prefecture, Sichuan, Dagu Glacier is a powerful source of poetic inspiration and a heaven for photographers in autumn with its towering mountains covered with diversely-tinted plants and crystal clear waters. Located between 2,300 and 5,100 meters above sea, the scenic area affords a great variety of natural sights. It is also home to the ruins of a massive quaternary glacier. [Photo by Liu Jie/China.org.cn]