the rhine-ruhr metropolitan region map with largest cities skylines silhouettes

arnsberg background bochum bonn bottrop cartography city cityscape cologne country deutschland dortmund duisburg dafrac14 sseldorf essen europe flag gelsenkirchen geography germany hagen hamm here illustration krefeld kapara ln leverkusen map moers monchengladbach mulheim munster neuss nordehein north oberhausen recklinghausen region remscheid rhine ruhr silhouette skyline solingen state street travel vector westfalen westphalia witten wuppertal