Others exist, at least to begin with, only as a shadow pressed into a field, visible solely from the air at a particular altitude and angle of light. The enclosure at Ballyhoodane, in County Limerick, belongs to this second, quieter category. It was not stumbled upon by a farmer turning soil or a walker consulting a map, but spotted from an aircraft, its outline emerging from the surrounding landscape as a crop or soil mark, the kind of faint trace that can vanish again when the season changes.

The site was identified by The Discovery Programme, the Irish archaeological research body, using medium-altitude aerial photographs taken in 1986. It was subsequently recorded and published as part of Doody's 2008 study, The Ballyhoura Hills Project, which appeared in the Discovery Programme Monograph series and drew together survey work across this upland and lowland border region of south Limerick. The reference assigned to the monument is LI023: Bruff 174.02 AP 4/3711. An enclosure, in the archaeological sense, is simply a defined area bounded by a bank, ditch, wall, or some combination of these, and they range in date from the prehistoric through to the early medieval period. Without excavation, it is rarely possible to say with confidence what purpose any given example served, whether settlement, agriculture, ritual, or something else entirely. What the aerial record preserves is the shape; everything else remains open.

Because the monument was identified through aerial survey rather than ground investigation, there is no guarantee that anything is visible at ground level today. Crop marks, which appear when buried features affect how plants grow above them, can be highly seasonal, showing best in dry summers when shallow soils stress first over buried ditches or banks. Anyone curious enough to visit the area around Ballyhoodane, which sits within the broader Ballyhoura landscape of south Limerick, should consult the National Monuments Service mapping portal beforehand to locate the recorded position precisely. The surrounding countryside is typical of this part of the county, relatively quiet farmland at the edge of the Ballyhoura Hills, and the enclosure, if it registers at all on the ground, would likely appear as a low earthwork or a change in vegetation rather than anything dramatic.