Tradition holds that a trout appears in the northern well, known as Mary's well, and an eel in the southern one, called Sunday's well. This pairing of sacred animals with specific waters is an old feature of Irish holy well culture, where the presence of a particular fish or creature was understood as a sign of the well's sanctity and power. The wells here were visited by people seeking relief from toothaches, earaches, and other ailments of the head, through a practice of devotional circuits known as "rounds", a form of ambulatory prayer common at Irish holy sites.

The physical structure of the site is unusually elaborate. Each well is enclosed within a circular dry-stone wall, roughly 2.3 metres high and 1.7 metres in diameter, corbelled inwards and open at the top. Corbelling is an ancient building technique in which each course of stone projects slightly beyond the one below, creating a narrowing without the use of mortar or a keystone. Hartnett, writing in 1939, noted that these enclosures were once roofed and fitted with a door. Between the two wells, an arched stone recess contains steps leading up to a low altar bearing a statue of the Blessed Virgin. Set into the recess is a limestone slab carved with the letters "IHS" in false relief, with an inverted heart beneath. To the right of the altar, another limestone slab carries a rough depiction of the Crucifixion. Scattered across ledges and shelves are cross-inscribed stones, incised hearts and crosses left by pilgrims over the years, and small votive offerings, objects left as tokens of prayer or gratitude, accumulating quietly on the stone shelves provided for them.