It is easy to miss, and for most of recorded history, it was. What gave it away in 1996 was the freshly turned earth of recent reseeding, which brought a roughly seven-metre spread of heat-shattered rock to the surface, dark with the carbon-rich soil that surrounded it.

This is a burnt mound, a type of prehistoric site found across Ireland and Britain, typically interpreted as the debris left by repeated cycles of heating stones in fire and plunging them into water-filled troughs, possibly for cooking, bathing, or industrial processes. The stones crack under thermal stress and are then discarded in a growing heap, producing exactly the kind of charcoal-flecked, fire-fractured scatter visible at Ballinloughaun. The site sits in what is now an area of reclaimed and boggy pasture, with a coniferous plantation to the south-west and a field drain running east to west along its southern edge. These details of drainage and land reclamation are themselves telling. Burnt mounds tend to cluster near water sources and low-lying, once-wet ground, and the stream beside this one fits the pattern neatly. The boggy character of the surrounding land may also explain why the mound survived at all, preserved beneath layers of peat and turf until modern agricultural activity brought it briefly into view.