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
Salinas of the English Port loggerhead sea turtle ("Caretta caretta"). It hosts characteristic sand dune and wetland birds, including the greater hoopoe-lark ("Alaemon alaudipes"), the black-crowned sparrow lark ("Eremopterix nigriceps"), bar-tailed lark ("Ammomanes cinctura"), the sanderling ("Calidris alba") and the bar-tailed godwit ("Limosa lapponica"). It also has an important population of the Kentish plover: 50% of the total population of Cape Verde (150-300 individuals). Salinas of the English Port Salinas of the English Port () is a saline wetland in the southwestern part of the island of Maio, Cape Verde, northwest of the city Porto Inglês. It is a protected area ("Paisagem Protegida das Salinas