Frankfurt on the mouth of the Nidda into the Main, which flows into the Rhine between the Rhineland-Palatine capital of Mainz and the Hessian (historically Nassauian) capital of Wiesbaden. Also visible the Taunus suburbs of the districts of High Taunus and Main-Taunus, two of the wealthiest districts in Germany. (Source)
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Frankfurt as seen by the European Space Agency's Sentinel-2A (Source)
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The central Innenstadt district, as seen by a SkySat satellite (Source)