Tobar na Súl, the Well of the Eyes, is the kind of place whose function has outlasted almost every explanation for why it ever worked.

The Ordnance Survey Letters of 1839 recorded the well as lying roughly a quarter of a mile east of Rathlogan Church, and noted, with a hint of melancholy, that although it had long been held in great repute for curing sore eyes, it was by then little frequented. The tradition of visiting holy wells to seek cures for specific ailments is deeply embedded in Irish devotional practice, with particular wells associated with particular complaints, often reflecting a saint's patronage or a localised folk memory. By the time someone returned to Tobar na Súl in 1987, however, the well had clearly not been abandoned entirely. Rags were tied to the bushes nearby, a custom known as rag-tying or clootie-hanging, in which strips of cloth are left as offerings or tokens of prayer, sometimes with the belief that an ailment diminishes as the cloth decays. Small crosses and flowers had been arranged around the well, suggesting a living, if quiet, continuity of use. Roughly 150 metres to the west-southwest, across the townland boundary, a second holy well occupies the same general landscape, making this corner of Kilkenny an unusually dense node of such sites.