mettlach, germany - 07 17 2024: saar river lock and sluice, way across

transport walkway track bridge lane road highway vehicle waterway infrastructure railway overpass train boardwalk freeway asphalt mettlach germany 2024 saar river lock sluice entry lanes small town valley close saarschleife north german area saarland borders luxembourg france idyllic quiet touristic summer bike routes ships passing sarre saravus channel channeled managed calm canal schleuse staustufe wall water management shipping tourism travel destination trip famous tourist vacation journey saargebiet der