The Ordnance Survey maps name it after St Brendan, but local tradition has long associated it with St Columcille, and it is on his feast day that people come to visit. This kind of slippage between saints is not unusual in the Irish devotional landscape, where the dedication of a site could shift over generations, or where rival traditions simply settled into an uneasy coexistence. What makes this particular cluster of sites quietly odd is how modest the physical evidence is, and how much meaning has accumulated around it nonetheless.

The well itself is a small, smooth pothole, roughly thirty centimetres across, worn naturally into a flat rock outcrop just above the high-water mark. Around its southern side, someone has built a low semicircular cairn of drystone, about 1.2 metres in diameter and the same in height. A metre or so to the south-east stands a second structure, D-shaped in plan and slightly taller at 1.45 metres, referred to simply as the Monument. Coins and the remains of flowers lodged among the stones of both cairns suggest the site still draws offerings. A further fifty metres to the west, just below the high-water mark, lies a second pothole, slightly larger, with an irregular cairn built above it; this one is known locally as St Brendan's Well, keeping the Brendan association alive in a different spot. The antiquarian Roderic O'Flaherty noted this area in 1684 as a place held in memory of St Brendan, a detail recorded in Hardiman's 1846 edition of O'Flaherty's work.

The proximity of these features to the shoreline is worth bearing in mind for anyone making their way there. The lower well sits just below the high-water mark, meaning the tidal state will affect how accessible it is on foot. The cairns are small and unassuming against the rock, easy to pass without registering what they are.