The Ordnance Survey, which recorded field boundaries, ring forts, and ancient trackways across Ireland with considerable thoroughness, left this feature entirely off its historic maps of Cloondoorney More. What eventually revealed it was a satellite image, where a faint sub-oval shadow in the bog resolved, on closer inspection, into something deliberate: a low ring of heather and bog myrtle, roughly 22 metres east to west and 14 metres north to south, forming a blunt point at its eastern end. The enclosing bank rises only about 20 centimetres above the surrounding bog and stretches roughly 2 metres in width where it survives at all, which it does not consistently. The ring is intermittent, varying in width, and easy to miss from ground level. Inside, the surface is level and largely featureless, carpeted in the same low heathers, sedge, bog asphodel, bog cotton, and sphagnum moss that cover the surrounding wetland.

What the structure was built for, and when, remains unknown. An enclosure is a broad category in Irish archaeology, referring simply to a defined area set apart by a bank, ditch, wall, or some combination of these, and such features can range from prehistoric livestock enclosures to early medieval settlement platforms to ceremonial spaces. The bog in which this one sits occupies a flat, low-lying area, slightly below the gently undulating pasture and rough pasture that overlooks it from higher ground. A second enclosure lies approximately 27 metres to the south, which raises the possibility that the two features are related, though without excavation or dating evidence that connection remains speculative. The whole site came to light not through fieldwork but through the patient scrutiny of aerial and satellite imagery, a reminder that the Irish boglands almost certainly contain many more structures waiting for the right angle of light or the right algorithmic eye.