Near Milltown in County Carlow, there was once a well known as Brides Well, reputed to be holy, and associated in local tradition with Saint Brigid. It no longer exists, or at least cannot be found. The field in which it stood has been drained, and the well itself has not been located by anyone looking for it since.

The sole surviving reference comes from a 1933 article by O'Toole in the Journal of the Kildare Archaeological Society, which noted the well's name and its reputation for holiness. Holy wells, typically natural springs venerated over centuries through a blend of pre-Christian and Christian practice, were once extraordinarily common across Ireland. Many were associated with specific saints and visited on pattern days, local feast days marked by prayer, socialising, and ritual circuits of the site. Brides Well, with its dedication to Brigid, one of Ireland's most widely commemorated saints, would have belonged to this tradition. Agricultural improvement, particularly the drainage of wet fields during the nineteenth and twentieth centuries, quietly erased a great number of such sites across the country, leaving only occasional mentions in local journals to indicate they ever existed.