An oval enclosure, roughly 20 metres north to south and 15 metres east to west, was recorded on the Ordnance Survey's six-inch map of 1838, yet today it leaves no trace visible at ground level. That combination, documented but imperceptible, places it in a category of sites that exist more as cartographic memory than as anything a walker might stumble upon.

Enclosures of this kind are among the most common yet least understood monument types in the Irish countryside. They typically consist of a roughly circular or oval area defined by an earthen bank or fosse, and they served any number of purposes across different periods, from early medieval farmsteads to later stock enclosures. The fact that this one was captured by the first systematic Ordnance Survey of Ireland in the 1830s suggests it was at least partially legible in the landscape at that time, even if subsequent agriculture, drainage, or natural erosion has since levelled whatever remained above the surface. Its position overlooking the Derreen River follows a pattern common to such enclosures, which were often sited on low slopes with good drainage and a view of water.