The Bothnian Sea ("Swedish: Bottenhavet, "Finnish: Selkämeri) links the "Bothnian Bay (also called the Bay of Bothnia) with the "Baltic proper. "Kvarken is situated between the two. Together, the Bothnian Sea and Bay make up a larger geographical entity, the "Gulf of Bothnia, where the Bothnian Sea is the southern part. The whole Gulf of Bothnia is situated between "Sweden, to the West, "Finland, to the East, and the "Sea of Åland and "Archipelago Sea to the South. The surface area of Bothnian Sea is approximately 79,000 km². The largest coastal towns, from south to north, are "Rauma and "Pori in Finland, and "Gävle and "Sundsvall in Sweden. "Umeå (Sweden) and "Vaasa (Finland) lie in the extreme north, near Bothnian Bay.