Uvs Lake is a large, shallow, and highly saline lake located in the western part of Mongolia and the eastern part of Russia. The lake is a part of the Uvs Nuur Basin, which is one of the world's largest inland drainage basins. The lake is fed by several rivers and streams, including the Kharkhiraa and Sangil rivers, and has no outlet. It is situated at an elevation of 759 meters above sea level and covers an area of about 3,350 square kilometers.

Uvs Lake is home to a wide variety of flora and fauna, including several rare and endangered species. It is an important breeding ground for migratory birds such as the whooper swan, bar-headed goose, and Dalmatian pelican. The lake is also home to several species of fish, including the Uvs nuur grayling and the Taimen, which can grow up to two meters in length. The surrounding region is also home to several species of mammals, including the endangered snow leopard.

The Uvs Lake region is also home to several ethnic groups, including the Tuva and the Kazakhs, who practice traditional nomadic herding and fishing. The lake is an important source of water for these communities and supports a wide range of economic activities, including fishing, agriculture, and tourism.

The Uvs Nuur Basin and Uvs Lake were designated a UNESCO World Heritage Site in 2003 due to their unique natural and cultural significance. The area is also protected by several national parks and nature reserves in both Mongolia and Russia, which help to preserve the region's unique ecosystem and cultural heritage.