This area is known for its colorful pools formed by calcite deposits, especially in Huanglonggou (Yellow Dragon Gully), as well as diverse forest ecosystems, snow-capped peaks, waterfalls and hot springs. Huanglong is also home to many endangered species including the Giant Panda and the Sichuan Golden Snub-nosed Monkey. Huanglong was declared a World Heritage Site by UNESCO in 1992.
Description about Huanglong Scenic and Historic Interest Area by UNESCO
The property lies in the southern part of the Min Shan Range, approximately 150 km north/north-west of the provincial capital of Chengdu. It is divided into two distinct sites: the Huanglong subdivision and the Mouni Gully subdivision.
Tectonic activity, in the form of earthquakes, is fairly frequent. The relief is predominantly precipitous, a particularly spectacular example being where the Fujiang River flows through the Danyun Gorge. Above the timberline are extensive areas of precipitous mountain scenery, snow-covered for much of the year. Xuebaoding, or Snow Mountain Peak, is permanently snow-covered and bears the easternmost glacier in China.
Of greatest geologically interest is the extensive calcite deposition that has taken place, notably along the 3.6 km Huanglonggou (Yellow Dragon Gully) where there are several extensive areas of travertine pools. Algae and bacteria proliferate in a number of these pools, giving a wide range of colours from orange and yellow to green and blue. Other karst features include long limestone shoals, notably Liujinshan (Glazed Golden Fan) and Jinshatan (Golden Sand Beach), in Huanglonggou. These are extensive slopes of active limestone deposition, covered entirely by a thin layer of flowing water.