Sint Maartensvlotbrug-Het Wildrijk.
Freie Kuste Callanstoog-Petten.
When you drive from Alkmaar to Den Helder over the N9 along the canal you will pas the village Sint Maartensvlotbrug. With the bridge over the canal on you right site, you go to the left to the Zeeweg, drive about 500 meters and on your right hand you see a small wood.
It's a park owned by "Landschap Noord-Holland" and there are about 12-15 bunkers in it. They are all covered with earth and vegetation and closed. Please be careful with the park and the vegetation.