By its shape and construction it reads as a ringfort, one of the thousands of circular or near-circular enclosures built across Ireland during the early medieval period as defended farmsteads. But at some point, probably long after anyone last lived within its banks, it took on a second, quieter role: a place where unbaptised children were laid in the ground without ceremony and without the blessing of the Church.

The 1838 Ordnance Survey Name Books are direct about what this place was used for. The entry for Rathronan Parish records it plainly as "a large fort, in which children, who die without baptism, are buried." The practice behind that entry belongs to a widespread Irish tradition of burying unbaptised infants, who were excluded from consecrated ground under Catholic doctrine, in liminal spaces already set apart from the ordinary landscape. Ringforts, ancient and half-understood by the communities living around them, were frequently chosen for this purpose. Such sites were known collectively as cillíní or ceallúnaigh, informal burial grounds that operated outside the parish system entirely. This particular example measures roughly 50 metres east to west and 36 metres north to south, with the broader end facing west. It sits on a north-facing slope and is enclosed by an eroded earthen bank approximately 0.6 metres high and 8 metres wide, with a shallow external fosse, or ditch, running from the south-west around to the north-west. A field boundary has cut into the enclosing bank at its narrowest eastern point, the kind of agricultural interference that has altered countless such sites across the country.

The site lies in pasture and presents no dramatic visual reward. The interior slopes gently downward toward the centre, and there are no surface traces of burials or burial markers of any kind. What is visible is the subtle rise and fall of the earthwork itself, most legible in low winter light or from a slight distance. An aerial photograph taken in March 2006 as part of the Archaeological Survey of Ireland gives a clearer sense of its egg-shaped outline than anything visible from ground level. Access would require landowner permission, as it sits in working farmland. Anyone approaching it should expect a quiet, unremarkable field; the significance lies almost entirely in what the historical record, rather than the ground itself, preserves.