mettlach, germany - 07 17 2024: saar river lock and sluice, mirror calm water above

waterway bridge river canal reservoir water transport channel reflection vehicle walkway lake tree dock infrastructure track pond mettlach germany 2024 saar lock sluice dam wall top small town valley close saarschleife north german area saarland borders luxembourg france idyllic quiet touristic summer bike routes ships passing sarre saravus channeled managed calm schleuse staustufe management shipping tourism travel destination trip famous tourist vacation journey saargebiet der mirror