One of the interior walls of Stirling Castle, possibly within the castle keep taken in 1967.
It's interesting that the sky has a pink hue because another picture in the series had a similar look and I don't know if it's the result of film changes or if the sky had that colour when the picture was taken.
This was taken by a keen amateur photographer on Kodak film and is part of a larger series you can see in the list below, or read more about here.