Meijendel is a vast nature reserve of 2000 hectares southwest of Wassenaar. The area is known for its filtration dunes, which purify five billion liters of rainwater annually for drinking water. On weekdays, you can walk here in peace and spot foxes and roe deer. There are four marked walking routes, of which the blue and red route together form a beautiful walk. From the Abelentop, you have a stunning view over the coastline and The Hague. In autumn, you will see many red berries and flowering linseed flowers. At the observation wall, you can observe birds such as crested ducks and teal. The route passes along the dune areas Kijfhoek and Bierlap, which are accessible with a yearly pass or day pass. The forested part of Meijendel provides a home to many roe deer and mushrooms. At the visitor center, you can learn more about the flora and fauna of the area.