Tobar Rí an Domhnaigh, which translates roughly as the Well of the King of Sunday, sits in a level pasture field in Ballymacpierce in County Kerry, marked today by little more than a small depression in the ground. From it, a strong stream flows swiftly southward, and it is this current, described in the folklore record as a big caol, meaning a narrow fast-running channel, that prevented the traditional practice of "rounds", the walking of a prescribed circuit around a holy well as an act of devotion or penance. You simply could not complete the circuit.

Folklore gathered by Hannah Reidy of Ballymacelligott school preserves some of what was once known about the site. Mary Carmody, who married into the townland in 1860, confirmed that rounds had never been performed there, but was clear that the water carried a cure. Older people, she recalled, would take the water fasting, eating some of the watercress growing at the spring, and would often draw from it in the cool of the night. The two large springs that feed the stream were, at the time the folklore was recorded, sending water to the River Maine roughly a quarter of a mile away. Perhaps most striking is the detail that in a general water quality test conducted some years before, this well came first. Caoimhín Ó Danachair, writing in 1958, noted that the well was still remembered as having been holy, but that no devotions had taken place there within living memory. By the time of a later survey, the landowner had no knowledge of any traditions connected with it at all.