It measures roughly 3.4 metres north to south and 8 metres east to west, a modest footprint for something so ancient, and it sits about thirty metres north of a stream, which is precisely where you would expect to find it.

This is a fulacht fia, a type of prehistoric cooking site found in extraordinary numbers across Ireland. The basic principle is straightforward: stones are heated in a fire, then dropped into a water-filled trough to bring the water to a boil, and the cracked, spent stones are discarded in a horseshoe-shaped mound around the trough. Over time, those mounds of shattered, heat-reddened stone accumulate into the low spreads that survive today, often in boggy ground or near watercourses. The proximity to running water was practical rather than ceremonial, and the Garrigane example follows that pattern closely. What makes this particular site quietly notable is not the site itself in isolation but its company: a second fulacht fia lies only twenty metres to the north-west. Two such sites so close together suggest repeated activity in this small area, possibly across generations, by communities who returned to the same reliable water source and the same stretch of ground.