The effect is quietly disorienting, as though the earth itself is deferring to the old building at its peak. The enclosure is oval in plan, measuring roughly 57 metres east to west and 70 metres north to south, the whole surrounded by a modern stone wall that does little to soften the strangeness of what it contains.

The site takes its name from Killaspugbrone, a placename that preserves the memory of an early bishop, "kill" being the Irish word for church and "aspug" a corruption of the Latin "episcopus," meaning bishop. The medieval church at the centre of the enclosure is the oldest structure here, predating the gravestones that now crowd around it. Those markers carry inscriptions from the eighteenth, nineteenth, and twentieth centuries, three hundred years of local burial laid out across ground that was already ancient when the first of them was set down. The dune landscape presses in from all sides, making the enclosure feel both sheltered and slightly adrift from the ordinary world of roads and fields.