DUSSELDORF, GERMANY - JULY 8, 2013: Aerial view of Dusseldorf, Germany. Dusseldorf is part of Rhine-Ruhr metropolitan area inhabited by more than 11 m Stock Photo - Alamy
CityTalk | Change as Chance: Germany's Ruhr Metropolitan Region
Metropole Ruhr - Metropolis Ruhr
Rhine ruhr metropolitan area hi-res stock photography and images - Alamy
ScalableMaps: Vector map of Rhine-Ruhr (gmap regional map theme) | Map, Map vector, Vintage world maps
Ruhr area map hi-res stock photography and images - Alamy
Map of the Ruhr metropolitan area and the location of farms with... | Download Scientific Diagram