Where the surrounding field is soft and waterlogged, a low oval rise stays firm and dry, and that small anomaly is almost everything you can see of a burnt mound that has sat here, largely unnoticed, for thousands of years.

Burnt mounds are among the most common prehistoric monuments in Ireland, yet they remain poorly understood. They typically appear as kidney-shaped or oval heaps of heat-shattered stone mixed with charcoal-rich soil, always beside a water source, and this example in Ranagissaun follows the pattern precisely. Measuring roughly twelve metres north to south and eight metres east to west, it sits on the northern bank of a stream or drain, with rising ground about forty metres to the north. The standard interpretation is that these sites were used for cooking, with stones heated in a fire and then dropped into a water-filled trough to bring it to the boil, though theories about bathing, hide-working, and other industrial processes have also been proposed. Whatever the activity, it was repeated often enough to generate the characteristic mound of cracked, fire-damaged stone and blackened soil that survives here, barely proud of the surrounding field.