bawn79 wrote:
I wonder is there really an optical illusion attached to putting cairns on top of mountains and if so could this be part of the reasoning behind putting them up there.
Well, there are certainly odd things to do with positioning. If you look at the OS map (62 I think) you can see a cairn to the south of the hill. This is placed beyond the highest point. When this is done it is usually so that it can still be seen from the valley below. However, in the case of this southern cairn it is placed so that it appears to be on the top of the southern hilltop when viewed from the cairn at the top of Keadeen (if you see what I mean).The cairns on Seahan & Seefin look absolutely massive when viewed from around Brittas. P'raps there is something going on.