air blue dijk dike dikes flatland holland light Netherlands pays bas polder sea sky zee zeeland boat dutch landscape road sea dike seascape ecological energy mills power water windmills blue sky cloud clouds coast coastal coastline scene shore summer wave waves Afsluitdijk brown cars embankment highway parking traffic way white brouwersdam flat land rural spring sun sunny wild Ijsselmeer lake levee monument natural nature tower Zuiderzee coud green l sun fish fishing fishing boat ship architecture building city stairs abstract background bright clean elements filed fresh grass happy hondsbossche peace plant quiet warm wind zeewering