Known locally as Crag Grave Yard, it belongs to a particular tradition found across Ireland: the cillin, an informal or unconsecrated burial place set aside for those who could not, for one reason or another, be interred in a parish churchyard. Cillíní were most often used for unbaptised infants, and their quiet, marginal locations, field corners, old earthworks, liminal ground near water, reflect centuries of theological and social practice that kept certain categories of the dead apart from the main community of burial.

The earliest written description of this site dates to 1840, when it was recorded in the Ordnance Survey Letters, a remarkable series of local historical and geographical notes compiled by scholars working alongside the surveyors of the first large-scale mapping of Ireland. The entry, drawn from Volume 1, notes that the place lies in the townland then written as Cluain Chanáin, roughly two miles north of Limerick city in the parish of St. Munchin, and observes plainly that only children are now interred in it. The phrasing suggests the ground had already been in use for some time before that observation was made, and that its function as a children's burial place was, by then, well established locally.

The physical form of the site survives well enough to be traced from above. Aerial photography from Digital Globe shows the outline of a roughly circular enclosure, approximately twenty metres in diameter, consistent with early burial grounds that often reused older, pre-existing features in the landscape. It sits within the parish of St. Munchin, and while no elaborate monument marks it, its circular shape distinguishes it from ordinary field boundaries. Anyone visiting the area should expect an agricultural setting rather than a formal heritage site, and the ground itself may not be immediately obvious at ground level. The aerial view remains the clearest way to appreciate the enclosure's form.