Road construction has a long habit of interrupting the past, and the building of the Kildare Bypass proved no different. When groundwork began on the Curragh, the great open plain of County Kildare long associated with horse racing and military history, workers encountered a series of charcoal scatters just beneath the surface. What followed was an excavation that brought to light something both mundane and genuinely puzzling: eight circular pits, distributed across an 80-metre stretch of ground with no discernible arrangement or pattern.

The pits varied considerably in size, ranging from 1.4 metres down to 0.4 metres in diameter, and from a metre deep to a relatively shallow 0.2 metres. Despite these differences in scale, their fills told a consistent story: burnt stone fragments, charcoal, and silty clay. This combination is characteristic of fulachta fiadh, a type of prehistoric cooking or heating site found widely across Ireland, in which stones were heated in fire and then dropped into water-filled troughs to bring them to the boil. The stones, repeatedly cracked by thermal shock, accumulate as the distinctive mounds of shattered rock so often turned up by Irish excavations. Here, the pits themselves appear to represent either the troughs or associated features from that kind of activity, though the lack of any obvious spatial organisation between them complicates a straightforward reading. Whether they represent a single episode of use or activity spread across a longer period is not recorded.