That proximity is itself worth pausing over. Cashels, the stone-built equivalent of the more common earthen ringfort, were typically the enclosed homesteads of farming families in early medieval Ireland, each one the centre of a small agricultural world. Finding two so close together raises quiet questions about how the land was organised, who held it, and whether the occupants were neighbours by choice or by kinship.

The cashel at Carnaun is subcircular in plan, measuring around 20 metres north to south, and what remains of it is a low, grassed-over drystone wall, the stones laid without mortar in the manner common across the west of Ireland. It sits within a wider field system, and several of the field walls that make up that system radiate outward from the monument itself at the south, south-west, and west, suggesting that the enclosure was not simply abandoned and forgotten but remained a fixed point around which later agricultural boundaries were drawn. The landscape, in other words, kept working with the cashel even after its original purpose had faded.