The Rhine-Ruhr metropolitan region (German: Metropolregion Rhein-Ruhr) is the largest metropolitan area in Germany with about 11,800,000 inhabitants. It is of polycentric nature and the only megacity in Germany. It covers an area of 10,820 square kilometers and lies entirely within the federal state of North Rhine-Westphalia. The Rhine-Ruhr metropolitan region spreads from the Dortmund-Essen-Duisburg (Ruhr Area) megalopolis in the north, to the urban areas of the cities of Mönchengladbach, Düsseldorf (the state capital), Wuppertal, Cologne (the region's largest and Germany's fourth largest city), and Bonn in the south.
(Wikipedia)
(Wikipedia)
