Man-made underground passage in Kilmoylerane South

Kilmoylerane South holds a man-made underground passage beneath its northern ringfort, marked only by two depressions in the grass. The earth keeps the entrance hidden, but the shape of the land still points to the hole where human hands cut through stone and soil. Anyone walking the ridge can drop a stone into one depression and watch it vanish, hearing nothing but the sudden absence of impact. The passage may have served as a refuge, a treasury or a trick of the imagination, yet the ringfort itself proves people valued that place enough to shape it.