koblenz, germany - 09 17 2024: balduinbrücke, stone arches bridge in lützel

waterway bridge river canal estate landmark architecture water tree tourism garden reservoir wall walkway arch transport building koblenz germany 2024: balduinbrücke stone arches city rhine marks north mittelrheintal unesco world heritage site mosel ends town right old lützel deterioration connection crossing valley center historic history medieval culture