The site is a large embanked enclosure, roughly 75 metres in diameter, of a kind once common across Ireland, where a raised earthen bank or scarp defined a roughly circular boundary for purposes that could range from settlement and cattle management to ceremonial use. What makes this particular example quietly unsettling is the gap between what people kept calling it and what anyone can now actually see.

The enclosure appeared clearly on the first edition of the Ordnance Survey six-inch map, published in 1842, drawn there with enough presence to be recorded by surveyors working across the country during one of the most thorough mapping exercises Ireland had ever seen. By the 1921 edition it was still legible, still roughly 75 metres across, still occupying the crest of its hill. The feature that defined it, a low scarp somewhere between half a metre and a metre in height, along with an associated hedge, was apparently enough to hold its shape across the better part of a century. At some point after that, land reclamation for pasture smoothed it away. The scarp was levelled, the hedge removed or absorbed, and the Round Field ceased to exist as anything a visitor could walk around or touch. Only aerial photography, specifically Digital Globe imagery taken between 2001 and 2004, has caught a faint trace of the south-eastern arc still pressing through the soil, the ghost of a curve that the ground has not quite finished erasing.