In a field at Scartlea in County Waterford, one of Ireland's most common prehistoric monument types sits almost entirely out of sight. A burnt mound, known in Irish archaeology as a fulacht fiadh, is essentially the accumulated debris of a Bronze Age cooking or industrial process: stones were heated in a fire and then dropped into a water-filled trough to bring the water to a boil, and the cracked, fire-shattered remains were piled nearby over repeated use. At Scartlea, that pile amounts to a layer twelve metres long and up to ninety centimetres thick, yet none of it breaks the surface. The only reason it is known at all is that a land drain cut through the low-lying ground and exposed the material in section, revealing the characteristic blackened, broken stone beneath a field bank at a bend in that bank.

Burnt mounds are found in their thousands across Ireland, typically in wet, low-lying areas close to a water source, which makes the location at Scartlea entirely consistent with the type. Most date to the Bronze Age, broadly speaking the period from around 2000 to 500 BC, though some examples extend into the Iron Age. They tend to be inconspicuous even when they are intact and above ground; when buried, as here, they become invisible except to the drain-digger or the archaeologist. What the Scartlea example offers, in a quiet way, is a reminder of how much of the prehistoric landscape is not missing but simply underneath ordinary fields, waiting to appear in a drainage cut or a building trench before disappearing again from view.