The Kroontjesbunker: secret command center in the dunes
The FL250 Flakgruppenkommandostand, nicknamed Crown bunker, lies hidden in the dunes of Huisduinen. The bunker owes its nickname to the striking shape of the tower, which resembles a crown.
Track flight movements with precision
Air raids were coordinated in the bunker during the Second World War. Using a glass plotter wall, soldiers relayed flight movements to anti-aircraft positions. The data came from radar stations along the coast and from positions further afield, such as Zandvoort and Terschelling. This created a chain of observation points that could accurately track every flight movement.
In recovery: future museum in the making
Three dedicated volunteers are working on restoring the bunker to its original state. The goal is to turn the Kroontjesbunker into a small-scale museum. The interior still exudes the atmosphere of a high-pressure command center.
Can be visited on selected days
The bunker is open to the public only a few times a year. Check the Facebook page for current opening times and updates. Flak Gruko. Tip: bring a flashlight for better visibility in the dark areas.
Watch your route – and the nature reserve
The Kroontjesbunker is located in a protected nature reserve. Therefore, please stay on the marked walking paths. Respect the nature and the silence of this special place.
This is how you reach the Kroontjesbunker
By car: Park at Fort Kijkduin (Admiraal Verhuellplein 1, 1789 AX Huisduinen). From there, follow the signs towards the bunker.
By bike or on foot: Take the side street off Duinweg (at number 34, in front of The Baron Crown hotel). Signs will guide you here as well.
Address
Admiral Verhuellplein 1, Den Helder
Opening hours
Sat 12 September. 10:00 – 17:00
Sunday, September 13. 10:00 – 17:00
Background information
Type of monument: Defensive structure
Original function: German Air Defense Headquarters
Construction period: 1944
Current function: Crown Bunker
