Terkhiin Tsagaan Nuur Lake, also called "White Lake", is nestled in the mountains of Khangai to 2,060 m. It measures 16 km wide and 20 km long, and its waters are of exceptional purity.
It is the heart of a protected area for its biodiversity, as diverse ecosystems cohabit: taiga (boreal forest), mountain steppe and wetlands supporting a rich fauna.
East of Terkhiin Tsagaan Nuur Lake is the extinct crater of the Khorgo volcano, which is responsible for the birth of the lake as the lava blocked the flow of a river, creating a natural dam.
The Khorgo volcano is located at an altitude of 2200 meters, its slopes are covered with basalt and its crater forms an almost perfect cone of 200 meters in diameter and 100 meters deep.
Its last eruption was 8000 years ago, it was the last active volcano in Mongolia.
