Castricum is a seaside town in the province of North Holland. It attracts tourists who come mainly to visit the beach and nearby dune landscape. Lake of Alkmaar-Uitgeest is in the vicinity, with facilities for sailing and windsurfing.
Castricum aan Zee is the seaside resort of Castricum. It is located on the North Sea coast at 52°33′23″N4°36′28″E / 52.5563°N 4.6077°E / 52.5563; 4.6077. It used to be called Bakkum aan Zee, and mainly consists of holiday homes, camping sites and the occasional house. Duincamping Bakkum is the oldest camp site of the Netherlands. The dune area used to be owned by Sophie, Princess of Albania. In 1906, a group of nature lovers asked permission to camp. The princess granted permission, and it developed into a permanent camp site.[6]
In 1942, construction started of the Atlantic Wall to defend against an Allied invasion. As part of the wall Stützpunkt Castricum was built, and 104 bunkers were constructed in the dunes. Many have been demolished, but some are still hidden under the sand. In 2020, a previously unknown bunker was discovered buried in the sand.[7]