Uvs Lake (Mongolian: Увс нуур, romanized: Uws nuur, Russian: Озеро Убсу-Нур, romanized: Ozero Ubsu-Nur; Chinese: 乌布苏湖, pinyin: Wū Bù Sū hú) is a highly saline lake in the endorheic Uvs Nuur Basin in Mongolia, with a small part in Russia. It's the largest lake in Mongolia by surface area, covering 3,350 km2 at 759 m above sea level. The NE tip of the lake is in the Tuva Republic of the Russian Federation. This shallow and very saline body of water is a remainder of a huge saline sea which covered a much larger area several thousand years ago.
Designated a UNESCO World Heritage Site in 2003. Designated a Ramsar Wetland in 2004.