Crescent Lake is a natural lake, because the water is like a crescent moon. Located in the Daxinganling region of Heilongjiang Province, Mohe City, Guolianhe open-pit coal mining area, the southern part of the Holla Basin, geographic coordinates for the east longitude 121 ° 58 ′ 45 ″, latitude 53 ° 00 ′ 24 ″, elevation 518 meters. The lake has a maximum width of 420 meters, a maximum depth of 19 meters, and an area of about 9 hectares. There is a lagoon river connected to the Hora Basin River, which can regulate the amount of water in the lake.

The north side of the crescent moon lake peninsula under the No. 4 coal beds and No. 5 coal beds between the proven ancient glacial period of a giant whale-shaped lenticular body of ice, buried depth of 46-56 meters, about 10 meters thick, the volume of 120,000 cubic meters, was called the third largest type of ice nucleation mound, is China's glacial permafrost rarely seen geological phenomena, has an important scientific research value.