This is a children's burial ground, known in Irish tradition as a cillín, a category of burial place that sits outside the consecrated ground of the parish churchyard. For centuries, unbaptised infants and others considered ineligible for Christian burial were interred in such spots quietly, often at the edges of townlands, near old ecclesiastical sites, or on elevated ground. The absence of grave markers is not unusual for a cillín; what the ground contains tends to be known locally, passed along in memory rather than carved in stone.

The site at Lacka occupies the centre of a larger enclosure, defined by a low drystone wall measuring roughly ten metres east to west and twelve metres north to south, now standing only about forty centimetres high and broken in places. Drystone construction, built without mortar by carefully layering and fitting fieldstone, is common in upland Irish landscapes where stone was plentiful and lime scarce. Within the northern part of the outer enclosure, grass-covered wall-footings suggest the presence of a building of similar proportions, though its function and date remain uncertain. The relationship between the possible building and the burial ground is not clear, but the combination of an enclosure, a potential structure, and a designated burial area points to a site with some depth of use and meaning in the local landscape.