marina at sunset at the marker wadden, five sprawling artificial islands, constructed from sucked-up and refashioned fine silt,

amsterdam applying artificial boat boats coast coastline constructing cultural development dutch ecological ecosystem environment flevoland freshwater future harbor harbour heritage holland islands lake land landscape landscapes lelystad manmade marina marker markermeer moon nature netherlands object perspective recreation reflection restoration sailing scenic sea shore sludge sunset tides unique valuable values wadden water waterworks wetland