The National Park de Loonse and Drunense Duinen is a vast nature reserve of over 8,600 acres and lies between the cities of Tilburg, Waalwijk and 's-Hertogenbosch. In the Loonse en Drunense Duinen you will find mostly dry areas with coniferous forest, heathland and lots of sand, but also the humid areas of the extensive stream valley landscape of the Zandleij is part of it. It is one of the largest drift sand areas in Western Europe and is also called the Brabant Sahara. The area still has about 7,400 acres of shifting sands that can blow around undisturbed. The blowing sand continuously creates wonderful metamorphoses in the very open landscape.