Not an unusual story in Ireland, where holy wells and mineral springs punctuate the landscape, but this one has vanished so completely that nothing remains above ground to mark where it stood. It is a place that exists now almost entirely in the historical record, a site defined by its own absence.

The well was known as Feenisk, an anglicisation of the Irish Fionn Uisge, meaning bright or clear water, a name that points to the qualities that made it locally celebrated. It functioned as a spa well, drawing visitors who believed its waters had curative properties. Spa wells of this kind were a feature of fashionable life in the seventeenth and eighteenth centuries across Britain and Ireland, when mineral-rich springs were promoted as remedies for a range of ailments. Whether Feenisk attracted a grand clientele or served a more localised devotional and medicinal role is not recorded in the available notes, but its reputation was evidently established enough to be documented. The site was levelled in the late nineteenth century, as noted by Daly writing in 1957, and whatever physical infrastructure had gathered around the well, a surround, perhaps a basin or small enclosure, was removed in the process.

For anyone curious enough to go looking, the difficulty is that there is genuinely nothing to find. The well formerly lay within the bounds of Phoenix Park, Dublin's vast public park on the north-western edge of the city, but no marker or memorial has been recorded at the location. A visit is less about seeing something and more about the particular experience of standing in a place where something once was, knowing the ground was deliberately cleared and the water source erased. Researchers interested in the documentary record might start with Daly's 1957 account, which appears to be the primary source for what little detail survives about Feenisk's character and fate.