Small mounds of stones lie within, grassed over now, and the Ordnance Survey maps it plainly as a children's burial ground, marked disused. That designation alone carries considerable weight. This is a cillín, the Irish term for an unconsecrated burial ground where, for centuries, unbaptised infants were interred outside the formal rites and boundaries of the Catholic Church. Because they had died without baptism, they were considered by church doctrine to be excluded from consecrated ground, and so communities created their own spaces, often at liminal or ancient sites, to bury them. The practice continued well into the twentieth century in parts of rural Ireland.

The enclosure at Ballynagraigue is roughly circular, measuring 33 metres north to south and 35 metres east to west, enclosed by a low earthen bank around five metres wide. The bank's exterior rises between 0.4 and 1.6 metres, its interior face rather lower. The internal area sits at a slightly higher level than the surrounding land, a subtle elevation that gives it a distinct, bounded character even today. C. Toal's North Kerry Archaeological Survey, published in 1995 by Brandon in association with FÁS, recorded the site as entry number 874, noting the grassed-over stone mounds within. Whether the enclosure itself is prehistoric in origin, perhaps a ring barrow or some earlier earthwork later repurposed for these burials, the survey does not definitively say, though the reuse of ancient enclosures for cillíní is a well-documented pattern across Ireland.

The hilltop position is worth noting. Cillíní are frequently found at elevated spots, on boundaries between townlands, or near water, places that sat outside the ordinary social and religious geography of a parish. The views from Ballynagraigue extend in all directions, which makes the site feel exposed and apart, qualities that may have made it seem appropriate for those buried beyond the official margins of the church.