Near the peak of a ridge at Lissanearla in County Kerry, a small oval enclosure was recorded on the first edition Ordnance Survey six-inch map of 1841, sitting just to the south-east of a public road on a relatively level stretch of pasture. Later editions of the same map series omit it entirely, leaving no cartographic trace of whatever once occupied that ground.

The enclosure measured roughly eighteen metres on its north-east to south-west axis and fourteen metres across, making it a compact feature, the kind of modest circular or oval earthwork found throughout Ireland, often the remnants of an early medieval farmstead or small settlement enclosure. Whether it vanished from later maps because it had been levelled and absorbed into the surrounding pasture, or simply because surveyors revised their assessments of what merited inclusion, is not recorded. The landscape itself, a gently elevated ridge with pasture running to the crest, would have made reasonable sense as a location for such a structure; commanding enough to offer some visibility, level enough to be practical.