Lake Onega Lake Onega Lake Onega (also known as Onego, ; or ; or ; or ) is a lake in the north-west European part of Russia, located on the territory of Republic of Karelia, Leningrad Oblast and Vologda Oblast. It belongs to the basin of the Baltic Sea, Atlantic Ocean, and is the second largest lake in Europe after Lake Ladoga. The lake is fed by about 50 rivers and is drained by the Svir River. There are about 1,650 islands on the lake. They include Kizhi, which hosts a historical complex of 89 orthodox wooden churches and other wooden constructions
Lake Ladoga In his opinion, the primary name of the lake was "old source", associated to the open sea, in contrast to the name of the Neva River (flowing from Lake Ladoga) which would derive from the German expression for "the new". Through the intermediate form "*Aldaugja", cam about, referring to "Ladoga (city)". The lake has an average surface area of 17,891 km (excluding the islands). Its north-to-south length is 219 km and its average width is 83 km; the average depth is 51 m, although it reaches a maximum of 230 m in the north-western part. Basin area: 276,000 km, volume: