St. Kevin's Well in Ballyman is more unusual still because it remained a functioning place of pilgrimage well into living memory. As recently as the 1950s people were still coming here to drink or collect the water, drawn by a tradition of healing that had accumulated around the site over centuries. A photograph taken by Patrick Healy in 1979, now held by South Dublin Libraries, shows the well as it appeared within a generation of that active veneration, quiet and unassuming in its wooded hollow on the south-facing slope of a small valley.

The well is dedicated to St. Kevin, the sixth-century monk most closely associated with Glendalough, just over the hills in Wicklow, and the proximity of that county border may explain something of the devotion here. The site appeared in the Ordnance Survey Letters of 1837, where it was recorded as a blessed well, and by 1900 a published account described it as surrounded by trees hung with rags left by pilgrims seeking cures, a practice known as clootie offerings, where cloth tied to branches near a holy well was believed to transfer illness or carry a prayer. The account noted that the rags had only lately ceased to appear, suggesting the custom was fading even then, though Caoimhín Ó Danachair's fieldwork, published in 1958, confirmed the well was still venerated at that point. About sixty metres to the east stand the ruins of a medieval church, recorded separately, which gives some sense of how long this particular spot has functioned as a focus of local religious life.

The well rises at the foot of a bank on the north side of the County Brook, in the townland of Ballyman, parish of Oldconnaught. The wooded valley setting means the approach can be damp underfoot, and the spring itself is easy to miss if you are not looking carefully at the base of the bank rather than the stream. The medieval church ruins nearby are worth locating on the way, as the two sites together give a more complete picture of what was once a small but clearly persistent sacred landscape on the Dublin and Wicklow margin.