Known in Irish as An Chill Bhreac, or Kilbrack in anglicised form, this sub-rectangular enclosure served until at least the 19th century as a cillin, a burial place for unbaptised infants. Because Catholic doctrine long held that the unbaptised could not enter consecrated ground, families across Ireland interred these children in marginal spaces, often ancient or liminal sites at the edges of parishes. Kilbrack is one such place, its interior marked not by formal headstones but by a profusion of low upright stones aligned roughly north to south, and a scattering of small cairns.

The enclosure measures roughly 58 metres east to west and 27 metres north to south internally. Its western, northern, and eastern boundaries are modern stone field fences, while the southern edge is defined by a low wall of stone and earth, no more than 60 centimetres high. At the centre of the enclosure, the burial area occupies a slightly raised, irregularly shaped patch of ground. Standing loosely within one of the cairns is a cross-inscribed stone, 88 centimetres tall and 15 centimetres wide. The cross carved onto it has expanded terminals, a decorative style found across early medieval Irish stonework, but the left arm has been lost entirely to spalling and the upper arm survives only in part. In the eastern portion of the enclosure, three stones set on edge form a feature resembling a cist grave, the kind of stone-lined burial box more commonly associated with prehistoric burials, though this example may be incomplete. A slight corbelling in a nearby field wall kink has been interpreted as a possible remnant of a clochán, a small dry-stone beehive-shaped structure associated with early ecclesiastical sites, though the evidence is thin. Several low earthen banks and stone-faced mounds occupy the interior; some seem to bound the burial area, while others remain unaccounted for, and may represent the collapsed remains of early buildings.

The site was documented in detail by J. Cuppage in the 1986 Dingle Peninsula archaeological survey, and the layering of periods it suggests, from possible early medieval ecclesiastical use through to 19th-century infant burial practice, gives it a density that its quiet, grassy surface does little to advertise.