No problem!
The bunker is now being used by our school as storage room.
We have other bunkers nearby too, but these are from the 2nd world war.
Only 1km away, there is the Nord-Ostsee Kanal(Kiel canal).
In the war it was a very important way for the german navy and I think it was attacked by allied planes at the sluices here to the Elbe and north sea.
These bunkers were for the AA.
There are many of them here in the landscape, but they are ruins.