When recorded in 1988, its internal diameter was just 0.45 metres, a narrow circular opening defined by a cemented wall, with a rag tree standing close by. A rag tree, for those unfamiliar with the tradition, is a tree beside a sacred well where visitors tie strips of cloth, each strip carrying a prayer or petition, left to decay in the belief that the affliction will fade with it. Small as the well is, it has been maintained with some care: by 2008 it had been conserved and set within a masonry surround, with steps leading down to the water and a path cut through the forest to reach it.

The well is dedicated to Saint Munna, the founder of the monastery at Taghmon, which lies roughly two kilometres to the south. Local tradition holds that the saint watered his horse at this spot and rested overnight at a site known as the saint's bed, located about a hundred metres to the west. These kinds of landscape associations, linking a saint's movement through a territory to specific rocks, wells, or hollows, were common ways of embedding ecclesiastical memory into the land. The pattern, which is the Irish term for the annual communal pilgrimage and prayer gathering associated with a holy well, was observed here on the 21st of October each year until around 1800, when it appears to have lapsed. Despite that, the well has not been abandoned; it continues to be venerated, suggesting that the connection people feel to it has outlasted the formal ceremony by more than two centuries.