Moon Bay is a bend of the Kanas River that lies upstream from Wolong Bay. As a result of the elevation difference of the lakebed, the changes in upstream water inflow, and the light effect, Moon Bay presents magnificent, changing colors. Moon Bay is sandwiched between mountains on its east and west, along which the river winds, forming a crescent moon, hence the name. In the upper and lower river bays, there exist two small sandy beaches resembling footprints. These unique features are described as the Immortal Footprints by locals.