A stream, rising directly from that rock face, once ran the width of the interior before escaping through the opposite side and continuing down to the lake. The building has been roofless for centuries. Today, only its footings remain, sitting within dense woodland at the junction of four pathways.

The most vivid account of the place comes from Sir Henry Piers of Tristernagh, writing in 1682. He describes the approach path growing progressively narrower as it climbs the hill, until it becomes a way hewn from the rock itself, hemmed in by trees rising from the water below. The chapel was dedicated to St. Eyen or Keyon, an early Irish saint, and on the first Sunday of harvest, pilgrims came in considerable numbers to perform their devotions. Part of the approach was made barefoot; at a certain point in the path, the remainder of the journey was completed on bare knees, over stone and gravel mixed with heath and grass. Once the religious obligations were fulfilled, the mood shifted. Piers records that people moved to a green area on the eastern side of the hill, where ale sellers had set up booths as at a fair, and pipers played for dancers. By the late nineteenth century, as Reverend Cogan noted in 1867, the pattern day had settled to the first Sunday of August, with local priests attending to hear confessions and administer the Eucharist. The holy well associated with the site was, by that account, still well frequented.

The 1911 Ordnance Survey twenty-five inch map shows the chapel as a small rectangular building oriented on a north-west to south-east axis, marked at the crossing point of four woodland tracks. That woodland has since closed in further around it, and what was once a known pilgrimage destination is now reduced to a scatter of low stone footings among the trees.