Sheep and farms on reclaimed polder lands around Amsterdam, Holland, Europe

A canal going from the sea to the reclaimed polder land which is some 20 feet lower than the sea, north of Amsterdam, Netherlands, Europe

A canal going from the sea to the reclaimed polder land which is some 20 feet lower than the sea, north of Amsterdam, Netherlands, Europe

Fence in the floodplains of Neufelder Koog, polder, Elbe estuary, North Sea coast, Schleswig-Holstein Wadden Sea National Park, Dithmarschen region, Schleswig-Holstein, Germany, Europe

View over the polder meadows on the left bank of the Rhine River and the Kranhaus buildings at the Rheinauhafen harbour during high water, Rhine River, Cologne, North Rhine-Westphalia, Germany, Europe

Kinderdijk near Rotterdam South Holland Zuid Holland Netherlands windmills mills at the Overwaard Polder

View over the polder meadows on the left bank of the Rhine River and the Kranhaus buildings at the Rheinauhafen harbour during high water, Rhine River, Cologne, North Rhine-Westphalia, Germany, Europe

Kinderdijk near Rotterdam South Holland Zuid Holland Netherlands windmills mills at the Overwaard Polder

Historic windmills, UNESCO World Heritage Site, Kinderdijk, South Holland, Netherlands, Europe

Kinderdijk, polder mills, South Holland, Holland, Netherlands, Europe

Groynes, Behrensch, Spieka-Neufeld, Spieka, North Woods, Lower Saxony, Germany, Europe

Polder mill, Kinderdijk, South Holland, Holland, Netherlands, Europe

Polder mill, Kinderdijk, South Holland, Holland, Netherlands, Europe

Sky is tinged with purple at dawn on the windmills reflected in the canal Kinderdijk, Rotterdam, South Holland, Netherland, Europe

Morning sun just risen shines in the canal where windmills are reflected Kinderdijk, Rotterdam, South Holland, Netherlands, Europe

Aerial photograph of the Pitt Polder Ecological Reserve, British Columbia, Canada.

Aerial photograph of the Pitt Polder Ecological Reserve, British Columbia, Canada.

Polder or re-claimed lands, North Holland, Netherlands

Polder or re-claimed lands, North Holland, Netherlands

Tall reed stalks and feathery seedheads growing in shallow water in the fens near Snettisham in Norfolk, Snettisham, Norfolk, England

Tall reed stalks and feathery seedheads growing in shallow water in the fens near Shettisham in Norfolk, Snettisham, Norfolk, England

Mont-Saint-Michel from a polder and its winding channel, Manche, Normandy, France