Image of Diffwys (Y Rhinogydd) (Cairn(s)) by GLADMAN

According to GAT the funerary cairn – or what remains of it – is the ‘hump’ beneath the wall to the left of the OS trig pillar. Y Llethr, 2,480ft sentinel of Y Rhinogydd, lies beyond. The monument would of course be obvious were it not for the surmounting wall.

Image credit: Robert Gladstone