More than 82 million people live between the North and Baltic seas in the north, and the Alps in the south of Germany. A number of midsize mountain ranges traverse the country. Its most important rivers include the Rhine, the Danube, the Elbe and the Oder. There are lakes too -- mostly in the northeast, in the state of Mecklenburg-Western Pomerania, but also in the foothills of the Alps.
The northern coasts are dotted with numerous islands, and the metropolises include Berlin, Hamburg, Munich, the Ruhr Valley, Cologne, and the Rhine-Main region around Frankfurt.