Sary-Chelek reserve
The State Nature Reserve of Sary-Chelek was created in 1959, a biosphere located between the Chatkal and At-Oynok ridges in the Jalal-Abad region, from 1200 to 4247 meters altitude. In 1978 it was declared as a World Biosphere reserve by UNESCO.
The largest lake named also Sary-Chelek is situated at 1874 meters above the sea level, with an area of 470 hectares and a depth of 234 meters.