The site known as Caherbaun, or Cathair Bhán in Irish, was once a ringfort, the kind of circular earthen enclosure that served as a farmstead and defensive boundary for an early medieval family, typically dating from somewhere between the fifth and twelfth centuries. Thousands of these forts survive across Ireland in various states of preservation. This one has been levelled entirely.

It appears on Ordnance Survey maps as a circular enclosure and was recorded in the Ordnance Survey Name Books as an earthen fort, the local townland being Drummod. The Irish name Cathair Bhán translates roughly as the white stone fort or pale fort, which suggests the site may once have had more visible structure than a purely earthen bank, though the name alone cannot confirm this. What is known is that by the time archaeologists A. O'Sullivan and J. Sheehan catalogued the Iveragh Peninsula's monuments for their 1996 survey published by Cork University Press, the fort had already been lost to the landscape, its circular form surviving only in cartographic memory rather than in the ground itself.