It is not the enclosure itself that draws the closer attention here, with its oratory and hut and covered passage, but this structure positioned five metres beyond its northern wall, on a sharply falling slope above Kenmare Bay. The platform is a feat of patient construction: where the ground drops away to the south-east, the builders raised the facing to 1.7 metres, keeping the upper surface level by sheer accumulation of coursed rubble. Alternate layers of long thick slabs and regularly coursed thin slabs give the downslope face a deliberate, almost rhythmic appearance. The whole upper surface, measuring roughly 8.7 metres by 6.3 metres, is enclosed by a low retaining wall, and at least one narrow entrance, 0.7 metres wide, pierces the south-west side.

What stood on this platform is not entirely certain, but the evidence on its surface offers some direction. A denuded rectangular mound of stone, around five metres by 2.5 metres, sits at the centre; it includes some quartz and retains traces of coursed facing at its south-east end. This mound is thought to be a leacht, a type of commemorative or devotional cairn associated with early Christian practice, sometimes marking the burial place of a saint or used as a focus for prayer and pilgrimage. Beside it, at the south-west, stands a cross-slab. The broader site at Cill Rialaigh was in use as a ceallúnach, an early ecclesiastical burial ground, into the nineteenth century, and a holy well lies approximately ninety metres to the south-west. That continuity of use across more than a millennium says something about how tenaciously these places held their significance in local religious life, long after whatever community first built them had dissolved.