The only reason we know it exists at all is a single aerial photograph taken on 15 July 1970, in which the outline of the structure appears as a cropmark, the subtle difference in plant growth that occurs when crops root into soil disturbed by ancient ditches or walls long since collapsed and buried. It is one of those cases where archaeology reveals itself not to the eye on the ground but to the camera at altitude.

The enclosure lies on a gentle east-to-west slope on the eastern side of the plain of the River Goul, in the kind of rolling, softly undulating landscape left behind by glacial activity. A circular enclosure of this type would generally be understood as a ringfort, the most common monument type surviving in the Irish countryside, typically dating from the early medieval period and used as a defended farmstead. Most ringforts survive as earthen banks and ditches, visible as slight raised features in pasture. This one, however, sits under tillage, and ploughing over centuries has levelled whatever earthwork once existed at the surface. What remains is an impression in the subsoil, legible only from the air, and only then under the right crop and at the right time of year, when differential moisture retention causes the vegetation above buried features to grow fractionally differently from the surrounding field.