a tributary of the Iskar. To the east is situated the summit of Deno (2,790 m), to the southeast is Irechek (2,852 m), to the south are Musala (2,925 m) and Malka Musala (2,902 m), to the west is the valley of Beli Iskar river.

The lakes are formed in three interconnected cascading cirques, giving rise to the glacial valley