Once a year history comes alive at the Fort near Krommeniedijk. In early spring, part of the polder is flooded on purpose. Thus, the ‘principle’ behind the Defence Line of Amsterdam – inundation - is made visible. The event attracts hundreds of people, but also many meadow birds and migratory birds. Here you can see large gatherings of European golden plovers, lapwings, black-tailed godwits, ducks and geese. Take a visit at the experience centre Fort K'ijk, about nature and the landscape in and around de Stelling.