The water, emerging from the base of a tree-covered limestone scarp, collects into a basin barely sixty centimetres wide and less than twenty centimetres deep before running eastward along the rock face. It is easy to miss entirely, and for most of the year, it is missed. Yet for generations, this unassuming trickle drew people from the surrounding area on the fifteenth of August, the feast of the Assumption of Mary, one of the most widely observed dates in the Irish holy well calendar. That tradition, according to McCarthy, continued up to the 1930s, when it appears to have quietly lapsed.

The well's longer history is harder to pin down, though there are suggestive traces. A map of Glanarought dated to 1600, preserved in the Calendar of Carew Manuscripts, marks a church in the general area, and McCarthy has proposed that this building may have stood close to the well itself. The association between holy wells and early ecclesiastical sites is a recurring pattern in Irish archaeology; wells were frequently focal points for devotional activity linked to nearby churches or monastic enclosures, sometimes pre-dating Christianity altogether and absorbed into later religious practice. Whether the Caher well fits that pattern precisely is not certain, but the combination of a recorded pilgrimage tradition and a mapped church in the vicinity at least gestures toward a deeper, if now largely invisible, layer of use.