This is no constructed well. The water simply occupies a cleft in the rock, roughly three metres long and one and a half metres wide, hemmed in by overhanging walls of stone rising two to three metres on its east and west sides. What the pool holds below the shallow southern end, nobody has measured. That combination of accessibility and mystery, the water you can see and the dark drop you cannot, gives the place an atmosphere that is hard to attribute to accident.

The site has been marked on Ordnance Survey maps since at least 1842, appearing again on the 1920 edition with the same designation: Holy Well. That continuity of naming across nearly eighty years of official cartography suggests it was well recognised locally long before either survey was made. About five metres to the east lies a penitential cairn, now spread flat. Penitential cairns, sometimes called prayer cairns, are accumulations of stones traditionally associated with acts of devotion at sacred sites, typically built up by successive visitors leaving a stone as part of a ritual circuit or rounds. The fact that this one has collapsed and spread suggests either long abandonment or repeated disturbance. Roughly eighty metres to the north-north-west sits a separate enclosure, hinting that this corner of Treanmanagh held some broader ceremonial or settled significance beyond the well itself.

The pool has a shelf at the base of both the eastern and western cliff walls, features that may once have served practical or ritual purposes, offering a foothold for someone drawing water or kneeling at the edge. The southern opening is the most accessible approach, though there may be spoil, displaced earth or rubble, along that edge. The hazel wood overhead keeps the site shaded and somewhat enclosed, which would have made it feel set apart from the surrounding landscape even before any religious association was attached to it.