Arkhangelsk Oblast (the Northern Dvina), and the Mezen Bay (the Mezen and the Kuloy). Solovetsky Islands, as well as a number of smaller islands, are located in Onega Bay. Onega Bay and the Dvina Bay are separated by the Onega Peninsula. The Mezen Bay is separated from the main body of the White Sea by Morzhovets Island. Other major islands in the oblast include Shogly Island, Zhizgin Island, Yagry Island, Lyasomin Island, Layda Island, Nikolskiy Island, and Mudyugskiy Island. Almost all of the oblast is covered by taiga, the coniferous forest dominated by pine, spruce, and larch. Large areas in the middle
Onega River of the Onega is notable for the rapids, spread everywhere between Kargopol and Gorodok, and also located downstream from Porog (the name "Porog" means "a rapid"). The Onega basin area has an important historical and cultural significance. Kargopol is one of the oldest cities in Russian North (the traditional foundation date in the 12th century, first mentioned in the 14th century), and it still contains a big number of architectural and historical monuments. Oshevensk on the left bank of the Onega is the location of the former Alexandro-Oshevensky Monastery. Another historically important monastery in the Onega basin is the Kozheozersky