A church once stood here, recorded on the Ordnance Survey six-inch map of 1838 as a simple rectangular structure, but it has since disappeared without leaving any visible trace at ground level. What remains is the quadrangular graveyard, bounded by a modern stone wall and populated by headstones from the late eighteenth and nineteenth centuries, along with the ghostly outline of a much older arrangement.

The site belongs to a category of early ecclesiastical enclosure common across Ireland, where a religious community would establish itself within a defined boundary, often roughly circular or ovoid in plan, that functioned as a sacred and sometimes fortified precinct. At Castlemacadam, the enclosure itself may be readable in an unexpected place: the road that curves around the graveyard is thought to follow the line of the original boundary. This is a familiar phenomenon in Irish archaeology, where later routes and field boundaries quietly preserve the geometry of far older structures long after the structures themselves are gone. The abandoned nineteenth-century church, which stood approximately sixty metres to the northeast, adds another layer to the sequence, suggesting a shift in the focus of worship across the centuries while the burial ground remained in continuous use.