Biesbosch Museum Island, water safety was the key reason for the development of the Biesbosch Museum Island. As part of a national water safety programme, the Noordwaard polder has been turned into a water-retention area. Outlets on either side of the Biesbosch Museum were dug to create a new island..© 23 sept 2016 Marco van Middelkoop/Aerophoto-Schiphol