A stone cross was erected here in 1950, and the working suspicion is that the construction work partially levelled whatever ancient monument once occupied the hilltop. What remains is ambiguous: a scatter of grass-covered, loosely piled stones to the north-east of the cross, with no clear shape, no definable edge, and a small whitethorn bush growing alongside. It is the kind of archaeological trace that is easier to sense than to prove.

A cairn is essentially a mound of stones, usually covering a prehistoric burial, and Bregaun hill was noted as significant long before the cross arrived. The Kilkenny Journal of 20 July 1918 reported on excavations at Brengaun, suggesting there was once enough visible at the site to attract formal investigation. Whether those excavations uncovered a burial chamber or simply investigated the mound itself is not recorded in what survives, and no evidence of a burial has since been confirmed. The low, ambiguous spread of stones beside the railed enclosure around the modern cross may be all that persists of whatever was found significant enough to dig into more than a century ago. The 1950 cross, well-intentioned as a landmark and place of devotion, occupies the precise point where an older, less legible kind of marking once stood.