Arkhangelsk Oblast the south-west of the Oblast drains into the Kema River which belongs to the basin of the Caspian Sea. The area in the Onega River basin containing the biggest lakes in the oblast, such as Lake Lacha, Lake Kenozero, Lake Undozero, and Lake Kozhozero. The tundra of the Nenets Autonomous Okrug also contains a number of bigger lakes. The river basin of the Pinega is characteristic of the karst, with a number of caves in the region. The White Sea coast within the Oblast is split into the Onega Bay (where the Onega is the major tributary), the Dvina Bay
Arkhangelsk Oblast The oblast is administratively divided into six cities and towns under the oblast's jurisdiction (Arkhangelsk, Koryazhma, Kotlas, Novodvinsk, Onega, and Severodvinsk), one city under the federal jurisdiction (Mirny), twenty-one districts (one of which is Novaya Zemlya), and two island territories (Franz Josef Land and Victoria Island). Another six towns (Kargopol, Mezen, Nyandoma, Shenkursk, Solvychegodsk, and Velsk) have the status of the towns of district significance. Nenets Autonomous Okrug, which is administratively subordinated to the oblast, is administratively divided into one district (Zapolyarny District) and one town of okrug significance (Naryan-Mar). Huge areas within the limits of the oblast are included