In the townland of Trienearagh in north Kerry, there survives the site of a structure once known as Cahergal, or Cathair Gheal in Irish, meaning "white stone fort". The name suggests a cashel, a type of dry-stone ringfort once common across Munster, yet what is recorded here appears to have been considerably smaller than the nearby site that shares its map designation. The gap between the name and the surviving remains is part of what makes this corner of Kerry quietly puzzling.

When surveyors mapped the area for the Ordnance Survey in 1841 and 1842, they recorded a circular enclosure on this spot. By the time C. Toal documented it for the North Kerry Archaeological Survey, published in 1995, the enclosure itself had largely faded, leaving behind a sub-rectangular structure in the interior. That structure measures roughly 18.8 metres by 9.5 metres externally and stands only between 0.3 and 0.5 metres high, little more than a low grassy swell in the ground. Whether this internal feature was a dwelling, a storage building, or something else associated with the original fort is not certain, but its proportions are consistent with the kind of ancillary buildings sometimes found within cashels across the region.

What lingers here is the sense of a place that was once significant enough to earn a name, to be noted on a nineteenth-century map, and to be associated with a larger, better-preserved site nearby, yet which has since quietly contracted into near-invisibility. The name Cathair Gheal, with its suggestion of whitened stone walls catching the Kerry light, now belongs to a site where the stones themselves are largely gone.