This is a cillín, one of the unconsecrated burial grounds found across Ireland where unbaptised infants, and sometimes others excluded from the rites of the established Church, were laid to rest outside the bounds of churchyard ground. The flat stones and boulders that protrude from the eastern side of the mound at Kiltanon may once have stood as markers, uninscribed, now tipped or laid flat, quietly recording lives that official record-keeping barely registered.

The site was already established enough in the landscape to be named on Ordnance Survey mapping of 1842 as 'Burial Ground for Children', and it appears again under the same name in 1899, with a slight variation, 'Children's Burial Ground', on the 1920 edition. The mound itself measures roughly 14 metres east to west and 12 metres north to south, defined by a low irregular scarp that has been cut through on its northern side by a later field boundary. What makes this site unusual even among cillíní is what sits off-centre on its south-eastern top: the possible remains of a megalithic structure and a bullaun stone, a bullaun being a boulder with one or more deliberately carved cup-shaped hollows, associated across Ireland with early Christian and pre-Christian ritual use. Their presence here suggests the mound may have carried significance well before it became a place of children's burial, and that later communities chose this spot already knowing it was, in some older sense, set apart.

The mound sits on a gentle south-facing slope with open views across a low-lying landscape to the north-east and north-west, higher ground rising behind it. A small depression in the south-western scarp is the kind of detail that might be a later disturbance or might simply be the way the ground has settled over a very long time. The flat stones, the bullaun, the truncated edge: the place accumulates questions that the visible surface alone cannot answer.