Most such sites across Ireland have been tended, neglected, or quietly forgotten, but rarely stopped up by conscious decision. This one, tucked into hawthorn overgrowth at the western end of the Poulacarran Valley in the Burren, was sealed after two accidents occurred here, the water effectively entombed beneath the drystone walls that once framed it. What remains is a rectangular stone enclosure, roughly eleven metres long and less than one and a half metres wide, its western end collapsed, hemmed in by scrub and low pasture with the valley's limestone slopes rising steeply to the south and west.

The place carries a striking name. Tobermacreagh is likely an anglicisation of "Tobar Mac Creiche", meaning "Well of the Son of Plunder", associated with St Macreahy, a figure also rendered as St Macreehy. The well was already mapped and labelled on the Ordnance Survey six-inch sheets of 1842, and again on the 1920 edition, which at least confirms it was a recognised place across those generations, even if its ritual life appears to have been limited. When a local resident was asked about it in 1997, they reported that no patterns, the traditional devotional gatherings held at holy wells, were associated with the site, and that the only living tradition was a belief that the water could cure sore eyes. That single curative property, modest and specific, is in fact a common attribute of holy well water across Ireland, often connected to the presence of particular minerals or simply to long-held faith in a saint's intercession.

The well sits within a circular earthen enclosure, roughly twenty metres across, defined by a tree-covered bank with the remnants of a stone wall along its crest and a narrow entrance gap on the western side. Two metres to the south of the well stands a small cairn, around four metres in diameter and just under a metre high, smothered in moss and blackthorn. A cement trough sits immediately to the north. The ensemble is fragmentary and overgrown, but the basic geometry of enclosure, well, and cairn survives well enough to suggest this was once a more deliberately ordered space than it now appears.