Rhine Meuse Scheldt delta, the Merwelanden and Sliedrechtse Biesbosch with the former polder Kort en Lang Ambacht. The Biesbosch National Park is an area of freshwater tidal wetlands in North Brabant and South Holland and is one of the largest national parks of the Netherlands..© 23 sept 2016 Marco van Middelkoop/Aerophoto-Schiphol..