The well is dry now, at least it was when surveyors last visited, but the physical care taken in its construction is still legible: a neat enclosure roughly three metres by one, open to the east, with a stone ledge built into the northern side of the entrance that reads unmistakably as a seat, a place to pause and perhaps to drink.

The well sits about sixty-five metres south-southwest of Teampall Mac Duach, a church ruin on the island of Inis Mór whose name points to the same figure: Mac Duach, associated with the early medieval saint Colman mac Duagh, patron of the Diocese of Kilmacduagh on the Galway mainland. The Ordnance Survey Letters, compiled in the 1830s as part of a nationwide effort to document Irish place-names and antiquities, recorded the spring under its local name, Tobar Mac Duach, noting its character as a place of cool freshness. That kind of phrasing in the OS Letters usually signals a well with some communal or devotional significance, though the surviving record does not elaborate on any patterns or ritual practices that may have been observed here. The drystone construction, modest in scale but carefully made, suggests it was maintained with some deliberateness over time.