Could there have been a lighthouse there at one time i.e. bridge to gain access?
Annie
good suggestion, but more likely to be small navigation lights than a big lighthouse
I've been giving this some thought, and I wonder if the lighthouse idea might have something going for it. I've looked at rather a lot in the past hour or so, and there are some features in common with this picture.
(EDIT: John915 posted while I was typing; the red message didn't bring up the picture, but I now see he may be thinking on similar lines.)
The wall on the right, with a rather zig-zag shape: many lighthouses seem to have a substantial wall built around the site, sometimes of a similar shape to this - presumably to stop keepers wandering off the cliff edge in the dark or fog if their torches give out. So if I'm right, the lighthouse will be somewhere off to the right.
The bridge to nowhere: I wondered at first if there might be some kind of mooring on the other side of the rock, but now I'm wondering if there might be some kind of light, or more likely a foghorn. If you search for "Mull of Galloway lighthouse foghorn" (I don't think this is it, by the way), you'll see that the foghorn is some way down the cliff below the lighthouse. Presumably siting it against a cliff helps the sound to carry out to sea? So could there be something similar here?
Having said all that, I haven't found a picture to match ours, though most of the ones I found were quite recent. But do you think there might be anything in this?
Arthur