On the south-facing slope of Tooreen Hill in County Waterford, three low conglomerate stones sit in a line, spaced roughly a metre apart, pointing northeast to southwest across the hillside. They are modest in scale, none taller than about sixty centimetres, and easy to overlook. What gives the arrangement its particular interest is what is missing: the row was originally four stones long, stretching around five and a half metres, but one has been lost at some point, reducing it to its present length of just over three metres. A further outlier, a separate smaller stone, sits about two metres to the northwest, detached from the main alignment.

Stone rows, meaning two or more standing stones set in a deliberate linear arrangement, are found across the south of Ireland and are generally understood to be prehistoric in origin, most likely Bronze Age, though their precise purpose remains a matter of debate. Scholars have variously connected them with processional routes, astronomical alignments, and funerary ritual, without any single explanation winning consensus. The Tooreen example was recorded and described by Seán Ó Nualláin in his 1988 survey of stone rows in the south of Ireland, a systematic study published in the Proceedings of the Royal Irish Academy that catalogued dozens of such monuments across the region. The three surviving stones vary noticeably in shape: the northeastern stone is triangular in cross-section, the central one rectangular, and the southwestern one roughly square. Whether this variation in form was deliberate or simply reflects the nature of the available material is unclear.