The history of the Oostvaarderplassen is only half a century old. Large pools of water remained on reclaimed land that was once intended for industry. That did not happen in the end. Nature, with a little help from man, took over the land and grew into a rugged wilderness with extensive reed swamps, grasslands, lakes and willow forests. A wilderness where countless geese and water birds, flocks of butterflies, the rare sea eagle and the largest herd of wild horses in Europe have found their home.