sluice gate of historic woudagemaal unesco pumping station in lemmer, netherlands

infrastructure craftsmanship architecture conservation preservation woudagemaal netherlands engineering maintenance restoration sluicegate technology industrial innovation monumental waterworks revolution reflection friesland brickwork hydrology reservoir landscape historic heritage landmark building drainage facility pumping station tourism history masonry culture flowing sluice unesco lemmer scenic outlet travel europe museum unique marvel world water canal dutch steam plant brick crane steel stone fence inlet power hydro gate