It measures roughly seven metres across in each direction and rises only about forty centimetres above the surrounding ground, eroded on its southern side and easy to miss unless you are already looking for it. What makes it worth looking for is its age and its purpose, both of which are stranger than the modest mound suggests.

This is a fulacht fia, a class of monument found across Ireland in the thousands, most of them dating to the Bronze Age, somewhere between two thousand and four thousand years old. The term is an Old Irish phrase sometimes translated loosely as a cooking place of the deer, and the prevailing interpretation is that these sites were used for boiling water, most likely for cooking meat. The method involved heating stones in a fire until they were intensely hot, then dropping them into a water-filled trough, usually timber-lined and sunk into the ground nearby. The cracked and blackened stones, useless after a single heating, were raked aside after each use, and over generations that refuse built up into the characteristic horseshoe mound that survives today. The shape of the mound is a consequence of tipping the spent stones to either side of the trough, which sat at the open end. At Uragh, that opening faces north-west, consistent with the position of a working area set back from the river but still close enough to draw water easily. The boggy ground to the north-west and the steep fall of land to the east and south-east suggest that water was both accessible and difficult to drain away, a combination typical of fulacht fia locations across the country.