warning sign: hochwasser - flood warning with no entry sign

lake water shore reflection river reservoir sea wetland coast wilderness tree bay pond waterway marsh landscape nature andernach small town koblenz bonn old located close rhi rhine roots back roman times medieval buildings visible flood stretches calm years waterfront parks flooded 2021 spring slow blue germany park trees watefront leading elevated road warning sign crane alter kahnen surrounded hochwasser flut ancient time leutesdorf harbor sign: entry