The opening, roughly two metres by eighty centimetres, faces south-west, and steps descend to a chamber where an underground stream runs east to west at a depth of between 1.4 and 1.8 metres. The roof, walls, and floor are largely natural rock, though the southern side appears to have been built up at some point, suggesting that generations of visitors gradually shaped what the landscape had already provided.

The well sits within a landscape that has been worked and settled across several periods, surrounded by an extensive field system of multiple phases. It was recorded on the 1915 Ordnance Survey six-inch map under the name Toberanahircallough, a name in the Irish tradition of tobar, meaning well, combined with a further element that likely preserves a personal or local name now difficult to trace with certainty. Holy wells of this kind were focal points for local devotion, often visited on the feast day of a patron saint, with prayers said, rounds walked, and offerings left. The modest arrangements still visible at this well follow that pattern: a modern circular pillar with a concrete cross stands to the north-east, and three irregular limestone slabs have been set upright to the north, markers that speak to continued use rather than abandonment. A field inspection in 1998 confirmed the well was still in active use at that time.