Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Northern Germany is the geographic area in the north of Germany. The native German concept of northern Germany is called Norddeutschland. The key terrain features of North Germany are the marshes along the coastline of the North Sea and Baltic Sea, and the geest and heaths inland. Also prominent are the low hills of the Baltic Uplands, the ground moraines, end moraines, sandur, glacial valleys, bogs, and Luch. These features were formed during the Weichselian glaciation and contrast scenically with the Central Uplands of Germany (such as the Harz) and Teutoburg Forest, which are occasionally included as part of northern Germany. The Altmark in Saxony-Anhalt, the northern Brandenburg area with the Prignitz and the Uckermark, and Westphalia are considered to be part of the North German region.