Noord-Holland

From Den Helder to Zandvoort the coast is full of concrete. Den Helder and IJmuiden were both a Festung, IJmuiden with its enormous S-boat bunker for the navy. Between them lie smaller positions at Petten, Bergen, Egmond and Wijk aan Zee. Inland, the forts and shelters of the Defence Line of Amsterdam count as well.

938 objects in 28 municipalities. 102 with a photo.