The start of the route is at the entrance of the Waterleidingduinen at Zandvoortselaan 130. You can buy a ticket at the machine at the entrance. You can do this online via https://awd.waternet.nl/bezoek/toegangskaarten/
Bunkerwandeling
In the Amsterdam Water Supply Dunes there are many bunkers, about 400. This route runs along several bunkers. They were built by Germany during the Second World War and are part of the Atlantic Wall.