Binglingsi grottoes is a series of grottoes filled with Buddhist sculpture carved into natural caves and caverns in a canyon along the Yellow River. It lies just north of where the Yellow River empties into the Liujiaxia Reservoir. Administratively, the site is in Yongjing County of Linxia Hui Autonomous Prefecture in Gansu province, some 100 km (62 mi) southeast of Lanzhou. It occupies over 130 km2 (50 sq mi), and is located entirely within Linxia Hui Autonomous Prefecture. The reservoir's shores belong to the prefecture's Yongjing County (the narrow northern part, and the north shore of the wide southern part), Dongxiang Autonomous County (eastern part of the south shore), Linxia County (western part of the south shore), and Jishishan Bonan, Dongxiang and Salar Autonomous County (the small westernmost section of the south shore).