Ringforts, the circular enclosures of earth or stone that once served as defended farmsteads during the early medieval period, are among the most common archaeological features in the Irish countryside, yet the spaces within and beneath them still yield surprises. This one, it seems, holds an opening in the ground that survives largely on its own terms.

The cave's existence was noted as part of a local archaeological survey of the Ballinrobe district, covering the areas around Lough Mask and Lough Carra, published in 1994. Beyond its location in the western section of the adjoining ringfort, almost nothing was recorded about it, for the simple reason that it was inaccessible at the time of the survey. That single phrase carries a certain weight. Whether the entrance was overgrown, flooded, collapsed, or simply too narrow to enter safely, the surveyors could not say what lay inside, and so the cave remains, officially at least, an open question.