The Republic is situated in the extreme southern Siberia, with the capital city of Kyzyl being located at the geographic "center of Asia". Uvs Nuur is the largest lake in Mongolia, which, at 753 m above sea level, covers an area of 3,350 km². Its northeastern part is situated in the Tuva Republic of the Russian Federation. Apart from the Uvs Nuur, the basin comprises several smaller lakes, notably the Ureg Nuur Lake, which lies at 1,450 m above sea level. As these lakes lie to the north of other inland seas of Central Asia, they are of key importance for waterfowl migration. Since the basin spans the geoclimatic boundary between Siberia and Central Asia, temperatures may vary from −58°C in winter to 47°C in summer. Despite its harsh climate, the depression is home to 173 bird species and 41 mammal species In 2003, the UNESCO listed the Uvs Nuur Basin as a natural World Heritage Site.[3] It was nominated as "one of the largest intact watersheds in Central Asia