No headstones, no inscribed slabs, no carved crosses; just an overgrown rectangular area defined by a low spread of stone, with an entrance gap on the eastern side and, puzzlingly, a small cairn sitting outside the perimeter wall to the north. The absence of any visible commemoration is the first thing that sets this place apart.

By 1920, the Ordnance Survey was naming it a children's burial ground, and the designation points to a practice once widespread across Ireland: the interment of unbaptised infants, and sometimes stillborn children, in unconsecrated ground separate from the main parish cemetery. These sites, often called cillíní, were frequently located at the margins of older ecclesiastical land, and Killian fits that pattern, positioned just south-east of the centre of a wider early Christian enclosure. The ground itself measures roughly 30 metres east to west and 27 metres north to south internally, enclosed by a stone spread between three and four metres wide and up to a metre in height, with some original facing stones still visible along the northern side. The entrance, just one and a half metres wide, sits towards the southern end of the eastern wall. The cairn outside the northern perimeter, five metres across and standing about 0.7 metres high, is recorded separately and its precise relationship to the burial ground is not fully explained. O'Flanagan noted the site in 1928, and MacMahon returned to it in 1984, but the ground itself remains as it appears to have always been: unmarked and overgrown.

The lack of grave-markers is not neglect but convention. Families who buried children here were often working within a theological and social framework that denied formal rites, and the anonymity of such plots was, in most cases, deliberate. What survives at Killian is not ruin so much as the original condition of the place.