Ubsunur Hollow Biosphere Reserve

Uvs Lake Basin is an endorheic basin located on the territorial border of Mongolia and Tuva, a republic of the Russian Federation. The basin is part of the Central Asian Internal Drainage Basin and is named after Uvs Lake, a large saline lake situated in the western part of its drainage basin and is one of the last remnants of the mammoth steppes. Uvs Lake is a shallow lake with an area of 3,350 km². Its entire basin, which includes several smaller lakes, is 70,000 km². ()