The feature is a pothole sitting below the high water mark, which means the sea claims it regularly, and yet its reputation as a holy well has persisted among those who know the island.

Holy wells in Ireland occupy a peculiar middle ground between pre-Christian tradition and Catholic devotion. They are typically freshwater springs or pools associated with a saint or with curative properties, visited on particular feast days and sometimes marked by offerings of cloth tied to nearby bushes. What makes this example on Inis Múscraí quietly unusual is that it sits not at a spring but in the tidal zone, a natural pothole shaped by wave action over centuries. The local belief that this is a holy well despite its saltwater context, and despite its periodic submersion, suggests a form of place-memory that has little to do with ecclesiastical record-keeping. The detail was recorded via information supplied by T. Robinson, the writer and cartographer Tim Robinson, whose meticulous mapping of Connemara and the Aran Islands gathered precisely this kind of quietly held local knowledge that might otherwise go unrecorded.