The concrete blocks (in German: Höckerhindernisse) were placed here during World War II to block the road for Allied tanks. They were part of the Schoorl support point group (Steunpunktgruppe Schoorl), which included Bergen, Schoorl, Groet, and Camperduin, and consisted of more than 700 structures. The dragon’s teeth were used to reinforce weaker points, for example where a tank ditch could not be constructed. The idea was that tanks would get stuck on them, preventing the crew from advancing further.
Today, the “teeth” are still visible as striking pyramid-shaped blocks in the field. Because the invasion did not come from the sea, they ultimately played no role in the German defenses.