The label appears on every edition, which lends it a quiet authority, yet what it marks is not a dramatic underground chamber but a souterrain, a type of stone-lined underground passage built, usually in the early medieval period, beneath or beside a ringfort, likely for storage or refuge. By the time anyone came to formally describe it in the late twentieth century, the entrance had shrunk to a gap roughly twenty centimetres high and thirty centimetres wide, and the passage itself was no longer accessible at all.

The site sits within the western quadrant of a ringfort, a class of enclosed farmstead that was the standard settlement form in early medieval Ireland. A 1971 description found the souterrain marked by a depression in the ground, filled with small stones and debris, with a fragment of a lintel stone still visible among the rubble. By 1976, the picture was much the same, a hollow in the earth with a very narrow entrance, the interior beyond reach. The pasture slopes gently eastward here, overlooking Coosan Lough, and the views across the water are wide and unhurried, which may partly explain why someone chose this spot to settle more than a thousand years ago.

What remains today is a landscape feature rather than an accessible monument. The depression and its scattered stones are the outward sign of a structure that has essentially closed itself off over time, yet the cartographic insistence on the word "Cave" across successive map editions is its own small puzzle, a reminder that local knowledge of a place can outlast any physical means of entering it.