Lake Nemrut (Turkish: Nemrut Gölü; Armenian: Նեմրութ, Kurdish: Gola Nemrûdê) is a freshwater crater lake in Bitlis Province, eastern Turkey. It is part of Nemrut Caldera (Turkish: Nemrut Kalderası), a volcanic caldera atop Volcano Nemrut.
The caldera is located west of Lake Van in the Tatvan, Ahlat and Güroymak districts of Bitlis Province. It is named after the biblical figure King Nimrod. The caldera is 13 km far from Tatvan, and 25 km from Ahlat. With its width of nearly 10 km, the crater of Nemrut Volcano is one of the largest calderas of the world. The western half of the crater is covered by the lake. At the summit, there are five lakes, two of them existing permanently and the others seasonal. The biggest of the lakes is Lake Nemrut in the form of crescent. It contains freshwater of colorless, odorless and drink water quality.
Lake Nemrut is situated at an elevation of about 2,247 m above main sea level. It has an area of 12.36 km2, and its average depth is about 100 m with a maximum depth of 176 m.
Nemrut Caldera is on the youngest volcanic cone in Turkey, which is in a not-eroded state. This unique structural geomorphology make it a subject of scientific research.
