It exists, for most practical purposes, only in aerial photographs and satellite imagery, a ghost of the landscape rather than a feature of it. What gives it away are cropmarks, the faint differential growth patterns that appear in vegetation above buried archaeological features, particularly visible in dry summers when crops or grasses respond to the hidden disturbance of soil and stone beneath them.

The site is a ring-barrow, one of a cluster of four possible barrows arranged along a northwest to southeast axis in this part of Limerick. A ring-barrow is a form of prehistoric funerary monument, typically consisting of a low central mound enclosed by a circular ditch and sometimes an outer bank, and is generally associated with burial activity in the Bronze Age or Iron Age. This particular example, the most northerly of the four, lies roughly 65 metres west of the road forming the townland boundary with Garryncahera. It was identified during an aerial photographic survey conducted from Bruff in 1986, captured on an image catalogued as Bruff 115.04 AP 5/2022. Faint cropmark traces were subsequently noted on Ordnance Survey Ireland orthophotos taken between 2005 and 2012, and on Google Earth imagery of the same period, appearing immediately north of a drainage channel running northwest to southeast across the field. The site was compiled and documented by Martin Fitzpatrick, with details uploaded in April 2021.

For anyone curious enough to seek it out, the site lies in private agricultural land and there is no public access or on-the-ground feature to observe. The most a visitor can realistically do is view the relevant aerial and satellite imagery online, where the cropmark traces, though faint, reward patient scrutiny. The best time to look for such features in satellite imagery is during prolonged dry spells, when the marks become most pronounced. The surrounding landscape of Cromwell Hill is otherwise unremarkable at field level, which is precisely what makes the aerial evidence so quietly arresting: four probable burial monuments tucked into improved pasture, known only because a camera happened to pass overhead on the right day.