It takes the form of a corbelled masonry structure, a technique in which stones are laid in overlapping horizontal courses, each projecting slightly inward until they meet at the top, creating a domed or beehive-shaped chamber without the use of mortar or a keystone. This particular example measures roughly two metres in external diameter and stands about one and a half metres high, enclosing a circular interior chamber with a water-filled depression at its centre and a low doorway facing west.

The well sits in low-lying ground close to a stream, and it is not alone in this small corner of Leitrim. The remains of Coolkill church lie approximately 250 metres to the north-east, a proximity that suggests the two sites formed part of the same local sacred landscape, the kind of pairing of church and water source that recurs quietly across early Christian Ireland. A 1944 record by a researcher named Blaney noted what may have been a bullaun stone associated with the site, a bullaun being a boulder or outcrop with one or more rounded depressions worn or carved into its surface, often found near early ecclesiastical sites and associated with ritual use. When surveyors returned in 1991, however, that stone could not be located, leaving open the question of whether it was removed, buried, or perhaps misidentified in the first instance.

The well repays a careful look precisely because of its construction. Where many holy wells are simply natural features absorbed into devotional practice, this one was deliberately built, which implies a community that valued the site enough to invest real labour in enclosing and protecting it. The water still collects in that small central depression, much as it presumably did when the corbelled dome was first raised over it.