It is not visible from the ground in any obvious way. What brought it to light was not excavation or local folklore but a set of aerial photographs taken from medium altitude in 1986, the kind of survey work that routinely reveals crop marks and soil discolourations invisible to anyone standing at field level.

The record for this enclosure belongs to the Discovery Programme, an Irish research body established to investigate the island's archaeological heritage systematically. It forms part of the Ballyhoura Hills Project, a detailed regional study published in 2008 by archaeologist M. Doody as Discovery Programme Monograph No. 7. That volume, running across a substantial section dedicated to aerial photographic evidence, catalogues numerous sites in this corner of Limerick that had never previously entered the formal record. The reference assigned to this particular enclosure is LI023: Bruff 206: AP 4/3711, a designation that situates it within the broader cartographic and archival framework of the Bruff area. An enclosure, in this archaeological sense, typically refers to a defined area bounded by a bank, ditch, or wall, and such features were constructed across many centuries in Ireland for purposes ranging from settlement and agriculture to ritual use. Without excavation, the precise date and function of the Knockroe example remain unconfirmed.

Because the site was identified through aerial photography rather than ground survey or excavation, there is no visible monument for a visitor to inspect in the conventional sense. The feature may present as nothing more than a faint difference in the colour or growth pattern of grass or crops under the right seasonal conditions, typically dry summers when buried features affect surface vegetation. Anyone interested in the academic record can consult Doody's 2008 monograph, which remains the primary published source for this and related sites across the Ballyhoura Hills. The surrounding landscape, a rolling agricultural area in the south of the county near the Limerick and Cork border, is quiet and largely unvisited, which means even reaching the general vicinity of Knockroe requires some commitment to back roads and careful map reading.