Tigerstelling: G67 Küver 452b

The command bunker 'Bertha' is unique in The Netherlands due to its impressive size.

Location: Bunker Museum Terschelling

This G23 anti-aircraft weapons bunker is also known as the Sleutelbunker type L410A. Besides this one on Terschelling, only one other similar bunker exists in Den Helder.

This ‘Fourier’ bunker is a ‘Bekleidungskammer’ (‘Dressing Room’); a very rare bunker that we rarely come across. This specific type XXL VAR has not yet been found in other defences in the Netherlands. Usually it is being dug open especially for Bunkerdag.