koblenz, germany - 09 12 2022: flood walls with a gate under the bridges

river water waterway reflection reservoir tree lake canal bridge landmark sea pond tourism shore coast tower park koblenz regional center rhine mosel old town located rivers called rhein-mosel-stadt touristic context marks north mittelrheintal unesco world heritage site bingen valley villages castles medieval deutsches eck estuary ship shaped front holding german states flags statue kaiser wilhelm horse reunification monument wiedervereinigung 1990 festung ehrenbreitstein direktly east side germany 2022 background 2022: flood walls gate bridges