Now The Elenydd, that wild ‘Green Desert of Wales’, has perhaps more than its fair share of wondrously obscure prehistoric sites... however, this is arguably as obscure as they come: not only is it not indicated upon OS mapping... not even Coflein have been able to locate it, to date:
“Place name ‘Gurnos’ mutated from Gyrnos. Translates as ‘place of cairns’. At time of field visit no cairns found in immediate area, however area of rocky outcrop on E slope & top of Gurnos has numerable possible iron age features.(RSJ 2000)”
To be fair, it IS rather difficult to locate, being exactly where one would not expect it to be, about a half mile SW of the Rhos-y-Gelynnen stone row. The effort – extreme effort if, like me, one foolishly decides the direct approach from below to the south ‘won’t be that bad’ – is worth it, however: the cairn is pretty substantial, well preserved... and appears to feature the remains of an internal cist. Furthermore, the vibe is sensational.