The outline, roughly six metres by five, is partly defined by low wall footings along its southern edge, none rising more than ten centimetres above the surface. It would be easy to walk past without registering it as anything at all, were it not for what the hollow contains: a bullaun stone and a possible standing stone sitting within the depression itself. A bullaun is a boulder or outcrop with one or more cup-shaped hollows ground into its surface, objects associated across Ireland with early ecclesiastical sites and, sometimes, with folk cures or ritual use of the collected rainwater. Their presence here, alongside a potential standing stone, suggests layers of activity at this spot that reach well beyond any single period.

By 1916, the Ordnance Survey was already marking this as a church site rather than a church, acknowledging that what stood here had long since disappeared. The remains sit on a slightly raised area, roughly twenty-five metres north to south and twenty metres east to west, positioned at the centre of a wider ecclesiastical enclosure. The enclosure itself is the kind of roughly circular or oval boundary, often preserved in field patterns or low earthworks, that typically marks out an early Irish monastic or parish foundation. What makes Crossbeg particularly curious is that this is not the only church within the enclosure. A second church survives approximately thirty metres to the north-east, meaning the two structures once shared the same consecrated ground. A solitary hawthorn tree stands near the hollow, the sort of detail that recurs at old Irish sacred sites often enough to feel like a motif rather than a coincidence.