Given only this photo and the question “Where in the World is Professor Humphreys?“, an astute commentator (Toby) said:
It looks a bit like Ben Bulben, County Sligo, Ireland.
Which turns out to be only 100 km away from my location, one county over on the West Irish Coast (The photo is of Clare Island, seen from the shore of Clew Bay).
Well spotted Toby! I will be contacting you about arranging the charitable donation in your honour.