Yueyaquan (Chinese: 月牙泉; pinyin: Yuèyá Quán) is a crescent-shaped lake in an oasis, 6 km south of the city of Dunhuang in Gansu Province, China.

Mildred Cable and Francesca French visited the lake during their travels in the region in 1932 and recorded their impressions in their book The Gobi Desert: "All around us we saw tier on tier of lofty sand-hills, giving the lie to our quest, yet when, with a final desperate effort, we hoisted ourselves over the last ridge and looked down on what lay beyond, we saw the lake below, and its beauty was entrancing.

[3] Proposed groundwater diversions are modeled to raise the water table and level of the lake.

[4] The lake and the surrounding deserts are very popular with tourists, who are sand sledding, offered camel tours, all-terrain vehicle rides, helicopter tours and motor glides.

[5][6] Crescent Lake got part of the Dunhuang Yardang National Geopark which was recognized 2015 by UNESCO.