In rural areas, Northern Low Saxon a dialect of Low German and Saterland Frisian a variety of the Frisian language are still spoken, but the number of speakers is declining. Furthermore, the state of Bremen forms two enclaves within Lower Saxony, one being the city of Bremen , the other, its seaport city of Bremerhaven which is a semi-enclave , as it has a coastline. In fact, Lower Saxony borders more neighbours than any other single Bundesland. The northwestern area of Lower Saxony, which lies on the coast of the North Sea, is called East Frisia and the seven East Frisian Islands offshore are popular with tourists. In the extreme west of Lower Saxony is the Emsland , an economically emerging but rather sparsely populated area, once dominated by inaccessible swamps. The northern half of Lower Saxony, also known as the North German Plains , is almost invariably flat except for the gentle hills around the Bremen geestland.