The well sits roughly sixty metres south-west of Cahir Abbey, at the foot of a steep rock outcrop shaded by young beech trees. It is an irregular hollow in the rock, about two metres by four and barely twenty centimetres deep, with no surrounding stonework, no carved niche, no votive remnant of any kind. Clear water bubbles up from beneath a rock on the southern side and spreads into two sluggish streams, one heading north and one south, before both merge with a larger channel and eventually reach the Suir.

The name appears on the first edition Ordnance Survey six-inch map of 1840 and again on the revised edition of 1901 to 1905, suggesting it was established in local usage well before either survey was made. The designation almost certainly refers to Our Lady, placing this unremarkable pool within a widespread Irish tradition of Marian holy wells, sites typically marked by patterns, votive offerings, rounds, and other forms of communal or private devotion. What is unusual here is the complete absence of any such evidence. Whether the name was always more geographical than devotional, or whether whatever observance once took place here simply faded without trace, the record does not say. The larger stream the two outlets join is identified as a former mill race, a channel cut to divert water power to a mill, which hints at a landscape that was once considerably more worked and purposeful than the quiet, overgrown scene beside the abbey today.