Wikipedia
Iskanderkul is a mountain lake of glacial origin in Tajikistan's Sughd Province. It lies at an altitude of on the northern slopes of the Gissar Range in the Fann Mountains. Triangular in shape, it has a surface area of and is up to deep. Claimed to be one of the most beautiful mountain lakes in the former Soviet Union, it is a popular tourist destination.
It was formed by the congestion of the Saratogh river. It is 134 km from Dushanbe and 23 km from the Dushanbe— Khujand road.
The lake takes its name from Alexander the Great: Iskander is the Persian pronunciation of Alexander, and kul is lake in Tajik.
The outflow of the lake is the Iskander Darya, which joins the Yaghnob River to form the Fan Darya, a major left tributary of the Zeravshan River.