These are ring-barrows, a form of prehistoric funerary monument typically consisting of a low circular mound enclosed by a ditch and outer bank, and their absence from Ordnance Survey Ireland's historic mapping is precisely what makes them quietly remarkable. The ground above them offered no obvious clue to the casual observer, just wet pasture sloping along the western side of Cromwell Hill.

The site came to light not through excavation or fieldwork on the ground, but from the air. A 1986 aerial photographic survey of the Bruff area, recorded under the reference Bruff 109.04, captured the distinctive circular patterns that betray the presence of ring-barrows even when the earthworks themselves have been reduced to near nothing by centuries of agriculture. The group is catalogued as five related monuments under the reference LI033-089001 to 05, concentrated together in the northern quadrant of the field. More recently, the traces have remained visible as cropmarks, those faint but legible discolourations in vegetation caused by buried archaeology affecting soil moisture and growth. They appear on Ordnance Survey Ireland orthophotography taken between 2005 and 2012, and again on a Google Earth image dated 20 September 2020, compiled as part of a record uploaded by Martin Fitzpatrick in April 2021.

Access to the field itself is on private land, so any visit would require landowner permission. The cropmarks are most legible from aerial imagery rather than at ground level, where the wet, rush-prone pasture gives little away. Anyone interested in reading the landscape here would do well to study the Bruff aerial photograph and the available orthoimages before arriving, since the monuments register more clearly as subtle tonal differences in the grass than as physical features underfoot. The hill itself provides some orientation; the barrow group sits on its western flank, and the concentration of five monuments in one corner of a single field suggests this was once a place of some deliberate, repeated significance.