Cairns of this kind are among the oldest surviving human constructions in Ireland, typically raised over burials or as landscape markers, their stones gathered and placed by hand across centuries or even millennia. What makes this particular example quietly arresting is its nested quality, one cairn seemingly set within or upon another, suggesting either a deliberate two-phase construction or some later addition to an existing monument.

The outer oval cairn measures roughly 7.2 metres along its north-west to south-east axis and 6.8 metres across, but rises only around 0.45 metres from the ground, its stones pressed down and compacted over time. Sitting on top of that low spread of stone is a smaller circular cairn, about 1.4 metres in diameter and considerably taller at 0.78 metres, its stones still loose rather than settled. The site is recorded on the east side of a nearby trackway as it appears on the Ordnance Survey six-inch map of 1895, placing it firmly in the documented landscape of late nineteenth-century Kerry, even if the cairn itself is far older. The townland name Ferta is itself significant; in early Irish, ferta referred to a grave mound or burial place, suggesting that the funerary character of this hillside may have been recognised and named long before any modern survey.