Located at the north entrance of Chaya Mountain, it was built in the 1970s. The dam measures 20 meters high and 150 meters long, with a total capacity of 1.27 million m3, named after the Tianmo Peak. The region provides the outdoor scenes for the CCTV drama A Journey to the West shot in 1998. It is surrounded by mountains, interspersed with valleys and forests, installed with complete tourist facilities as a major tourist destination on the way of Boutique Route of Canyon.