It's called "pattern recognition" and "deducing from minute scraps of information".
I recognised the outline of the road cutting into the hill top, there is the vaguest sign of a wind mill in the background (we went there afterwards, remember), and small-sized pylon in the middle ground. The latter I did my best to make something pictorial from, and failed. The fence and the footpath looked familiar too.
So, you shot near the western entrance to the "Mirador del Estrecho". Just standing where the car on the left hand side of the Google Maps snapshot is.