old opening sluice gates of the lemster lock in lemmer, the netherlands

waterway vehicle boat bridge dock canal transport channel watercraft water infrastructure reflection river marina mast port walkway ship harbor sea old opening sluice gates lemster lock head lemmer province friesland netherlands ancient aquatics architecture black blue building city cityscape doors dutch equalizing europe fence historic holland house hydraulic ijsselmeer landmark landscape lemstersluis level marine nature nautical outdoor quay sail sky summer tourism tourist town transportation travel urban vacation view wooden