The remains of the presumed kerb... after quite a bit of ‘exposing’. Apparently, there are others completing the circumference now buried under the turf? I did have a look, but the site is seriously overgrown.
Hidden in plain sight. This one’s been on the list for years now... somewhat obscure, to be fair. The glorious view is towards the ‘jaws’ of upper Cwm Ystwyth, with the cairn cemetery of Craig y Lluest approx background centre left.