Pomerania (; ; Kashubian: Pòmòrskô; ) is a historical region on the southern shore of the Baltic Sea in Central Europe, split between Poland and Germany. The western part of Pomerania belongs to the German states of Mecklenburg-Western Pomerania and Brandenburg, while the eastern part belongs to the West Pomeranian, Pomeranian and Kuyavian-Pomeranian voivodeships of Poland. Pomerania's historical border in the west is the Mecklenburg-Western Pomeranian border Urstromtal which now constitutes the border between the Mecklenburgian and Pomeranian part of Mecklenburg-Western Pomerania, while it is bounded by the Vistula River in the east. The easternmost part of Pomerania is alternatively known as Pomerelia, consisting of four sub-regions: Kashubia inhabited by ethnic Kashubians, Kociewie, Tuchola Forest and Chełmno Land. Pomerania has a relatively low population density, with its largest cities being Gdańsk and Szczecin. Outside its urban areas, it is characterized by farmland, dotted with numerous lakes, forests, and small towns. In the west of Pomerania lie several islands, the largest of which are Rügen, the largest island in Germany, Usedom/Uznam, and Wolin, the largest island in Poland. The region has a rich and complicated political and demographic history at the intersection of several cultures. Geography Borders Pomerania is the area along the Bay of Pomerania of the Baltic Sea between the rivers Recknitz, Trebel, Tollense and Augraben in the west and Vistula in the east. It formerly reached perhaps as far south as the Noteć river, but since the 13th century its southern boundary has been placed further north. Landscape Most of the region is coastal lowland, being part of the Central European Plain, but its southern, hilly parts belong to the Baltic Ridge, a belt of terminal moraines formed during the Pleistocene. Within this ridge, a chain of moraine-dammed lakes constitutes the Pomeranian Lake District. The soil is generally rather poor, sometimes sandy or marshy. The western coastline is jagged, with many peninsulas (such as Darß–Zingst) and islands (including Rügen, Usedom, and Wolin) enclosing numerous bays (Bodden) and lagoons (the biggest being the Lagoon of Szczecin). The eastern coastline is smooth. Łebsko and several other lakes were formerly bays, but have been cut off from the sea. The easternmost coastline along the Gdańsk Bay (with the Bay of Puck) and Vistula Lagoon, has the Hel Peninsula and the Vistula peninsula jutting out into the Baltic. Subregions The Pomeranian region has the following administrative divisions: Western Pomerania (Vorpommern) in northeastern