Lake Onega is one of the largest lakes in Europe, located in northwestern Russia. It covers an area of approximately 9,700 square kilometers and is the second-largest lake in the country after Lake Baikal. The lake is known for its diverse ecosystem, which includes various fish species and unique flora. The lake is surrounded by several towns, including Petrozavodsk, the capital of the Republic of Karelia. Lake Onega is also famous for its historical significance, featuring numerous islands, some of which house ancient Karelia petroglyphs and monasteries. The lake plays a vital role in local transportation and tourism.