At Mountnorth, a spring once known as Tubberhuwhen, or Joanna's Well, was covered over and absorbed into the Cork County Council water supply scheme, leaving no visible trace above ground. The well still exists in a functional sense, its water presumably still flowing, but the place itself has been thoroughly unmade.

The name Tubberhuwhen is an anglicisation of the Irish tobar, meaning well, combined with a personal name, and the Ordnance Survey Field Book of 1840 recorded it explicitly as a holy well. Holy wells in Ireland are typically springs or water sources associated with a saint or with older pre-Christian veneration, often visited for healing on pattern days tied to the liturgical calendar. By the time the antiquarian J. Grove White was writing between 1905 and 1925, however, the well's sacred character had already faded from local memory. He noted the OS description but added that it was not locally known as a holy well in his own time. The transition from holy well to municipal water source completed what popular memory had already begun, turning a named, storied place into infrastructure.