It is, in fact, a fulacht fia, one of Ireland's most common and least understood monument types: a Bronze Age cooking site where stones were heated in fire and then dropped into a water-filled trough, bringing it rapidly to the boil. Thousands of these sites survive across the island, always near water, always marked by that characteristic mound of cracked and blackened stone.

This particular example measures roughly ten metres along its longer axis and rises about a metre above the surrounding ground. The burnt material that forms the mound is not fully concealed; it is exposed along the stream bank and beneath a field boundary that runs along the mound's western edge, suggesting that later agricultural activity has cut across and partially disturbed the site. A spread of heat-shattered stones extends approximately sixteen metres northward across what appear to be old cultivation ridges, hinting at repeated use or a working area that once stretched well beyond the mound itself. Outcropping rock presses against the mound from the south, partly shaping how the site sits in the landscape. What gives the Cashelkeelty location an added layer of interest is its proximity to a standing stone row, which lies roughly fifty metres to the north-west. Stone rows, alignments of two or more upright stones set in a line, are found in some concentration in this part of Kerry, and their relationship to nearby monuments like fulachta fia remains a matter of ongoing archaeological discussion rather than settled conclusion.