Man-made underground passage in Ardpatrick

Underground in Ardpatrick, County Louth, a man-made passage cuts through solid earth, emerging in Liss Field beside what local tradition still calls a fort with a hollow centre. The shape suggests people dug through rock rather than waiting for rain to carve it, perhaps to hide, drain water or reach a chamber others could not find. Whatever the intent, the passage remains a deliberate wound in the landscape, proving the field has never been empty or inert.