Hidden in the Oostvoorne dunes is the so-called ‘Biberbunker’. This St-type L487, codename ‘Bertha’, was built to function as a radar command post for the German ari force. The bunker has since been set up as a museum and demonstrates how the command bunker worked. Guided tours of the bunker are available on Bunker Day, the last one of the day commencing at 17:00. 

In addition to the guidance of German fighters, all FLAKs (anti-aircraft cannons) were also provided with up-to-date altitudes and flight path information from here. A special Bunkerdag treat this year is the presentation of an entire FLAK, installed in its original bedding directly opposite the Biberbunker.

other activities in the area

Bunker 424 Seeburgtisch

This bunker is the forerunner of the nearby Biberbunker.
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The Biberbunker Foundation proudly presents a Luftwaffe anti-aircraft gun.
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