It is roughly 22 metres east to west and nearly two metres tall, and it is composed almost entirely of burnt and fire-cracked stone. That detail is the key to understanding what it is. A fulacht fia is a type of prehistoric cooking or heating site found in great numbers across Ireland, typically consisting of a trough dug near a water source and a surrounding mound of the stone debris left over from repeatedly heating rocks and dropping them into water to boil it. They are extraordinarily common in the Irish landscape, yet most pass unnoticed, absorbed into hedgerows and field margins, looking to a casual eye like nothing more than a slightly odd rise in the ground.

This particular example was noted as far back as the 1940s, when it appeared in the Schools Manuscript collection for Co. Kerry, recorded as sitting on Mrs D. Murphy's land in the adjoining townland of Knockacappul. At that point it was described as roughly circular and modest in scale, around 20 feet in diameter and 2 feet high. What survives today is considerably larger in extent, though machine drainage work and the haphazard dumping of spoil along the southern and western sides may have distorted its current dimensions. An open drain now skirts those same sides, and where it has cut through the mound, burnt material is visible in both faces of the cutting to a depth of 0.8 metres, confirming the depth of accumulated prehistoric activity beneath the surface vegetation. The horseshoe shape, with its opening facing west, is the classic form associated with these sites, the hollow once likely marking the location of the now-vanished trough.

The mound is largely inaccessible today, buried under dense overgrowth with no clear approach through the surrounding marsh. What remains visible is less a monument than a presence, a dark mass of ancient burnt stone quietly persisting in wet ground that has probably kept it from disturbance for millennia.