The arc runs roughly a hundred metres in diameter and sits to the south of a small cluster of sites that have quietly accumulated around a place of long-established sanctity: a church ruin, a children's burial ground, and a holy well. It is the kind of detail that disappears entirely at ground level, swallowed by field boundaries and grass, but resolves into something suggestive the moment you look down from above.

The enclosure, if that is what it is, was identified by researcher Caimin O'Brien and uploaded to the record in January 2019, drawing on Digital Globe satellite imagery rather than any ground survey. The church it appears to surround, or at least adjoin, is known as Temple Beinid, a name that preserves a personal name in the Irish dedication formula "teampall" meaning church. An ecclesiastical enclosure of this kind typically describes a roughly circular or oval boundary, often defined by a bank and ditch, that delimited the sacred precinct of an early medieval Irish monastery or church site. Such enclosures are a recognised feature of early Christian Ireland, and their circular form often predates the rectangular churchyard conventions that arrived with the Normans. The associated children's burial ground, known in Irish as a cillín, was a place set apart for the interment of unbaptised infants, reflecting older beliefs about the boundaries of consecrated ground. The holy well adds another layer; wells with religious associations were frequently incorporated into early church landscapes across Ireland, sometimes predating Christianity altogether.

The site is not formally excavated, and the enclosure remains tentative, inferred from aerial evidence rather than confirmed on the ground. Anyone visiting the area around Ballyallinan would be looking for a quiet rural landscape in which the visible remains are modest: the church ruin and its associated features are the more legible elements, while the ditch itself would require a careful eye and some foreknowledge to locate. Consulting the Digital Globe imagery in advance, or cross-referencing the National Monuments Service record numbers for the cluster of sites, gives a clearer sense of how the components relate to one another spatially.