It is not a grave, not quite an altar in any conventional sense, but a leacht, a type of commemorative or devotional cairn found at early Christian sites across Ireland, typically associated with pilgrimage or the veneration of a holy person. What makes this one quietly arresting is its setting: it sits inside a children's burial ground, itself tucked into the south-eastern corner of a rath, a circular earthwork enclosure of the kind built across Ireland from the early medieval period onward. And all of this lies within a promontory fort, a coastal defensive enclosure using natural cliff edges as part of its boundary. Layer upon layer of use, each century folding itself around what came before.

The antiquarian Thomas Johnson Westropp visited and recorded the site in the early twentieth century, describing the leacht as a circular arrangement of slabs roughly 1.8 metres across and under a metre high, its flat surface covered in white quartz pebbles. Such pebbles appear repeatedly at Irish holy sites and are thought to carry votive significance, left by those who came to pray or mark a visit. Westropp also noted a second, near-identical leacht standing about 16 metres to the west, just outside the boundary of the children's burial ground, known in Irish as a cilín or killeen, a term for the unconsecrated burial places where unbaptised infants were interred, separate from parish graveyards. The 1920 Ordnance Survey six-inch map labels both features simply as "Altars", a word that captures something of their ritual character while leaving the precise nature of their use open.