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Stadtplan: Frankfurt Am Main
Stadtplan.net provides a zoomable map of Frankfurt, as well as maps of the state of Hessen (Hesse) and Deutschland. In addition to the local map of streets, there is other city info, including links to events such as rock and other...
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Berliner Verkehrsbetriebe: Berlin Transport Services
BVG is Berlin's public transportation site - bus, S-Bahn, U-Bahn. Information and maps for getting around in Berlin. A well-organized resource. Content is in German.