In the first World War there was a large explosives factory at Troon and consequently there where a lot of armament factories in the area producing shells and bombs.
We know from friends that some of these places are still used for storage....
it could be one of these
My favourite place is Fort Douglas, I love the drive through the little lane and spot the hidden things!
Then into the Drovers pub on the A82 and oggle at the bar staff in kilts!