Lake Sev

Lake Sev (, meaning "black lake") is a lake located on the border between Armenia and Azerbaijan. It is split between the Syunik Province of Armenia and the Lachin District of Azerbaijan․ It is located at an altitude of above sea level and has an area of about . It is long, wide, and has a maximum depth of . The water is cold and clear, and the lake is inhabited by ishkhan. The lake water is used for irrigation. It is immediately adjacent to a smaller lake called Janlich or Jinli.
The lake and the surrounding area are currently the subject of a border crisis between Azerbaijan and Armenia. On 12 May 2021, Azerbaijani troops advanced some 3.5 kilometres into Armenia territory near the lake and took control of the nearby height of Mets Ishkhanasar. Although the international border between Armenia and Azerbaijan has never been formally delineated, Soviet-era maps show that most of the lake falls in Armenian territory.