The trig point sits within a cairn which seems to be part of a larger, grassed-over structure. Was it a burial cairn? The maps do not show any evidence of this but there are many prehistoric settlements on the surrounding slopes and it would seem like a logical place.
Uploaded to Geograph by Karl and Ali on 5 November 2017
Photo © Karl and Ali, 5 November 2017. Licensed for reuse under this Creative Commons licence