It is only about five metres across and twenty centimetres high, matted over with rushes and moor grass, and it would be easy to walk past without a second glance. What it contains, though, is the accumulated debris of prehistoric cooking or industrial activity: heat-shattered stones and charcoal-enriched soil, the signature residue of repeated high-temperature work carried out here, probably thousands of years ago.

This is what archaeologists call a burnt mound, a type of site found widely across Ireland and Britain, typically dating to the Bronze Age. The working interpretation is that stones were heated in a fire and then dropped into a water-filled trough to bring it to the boil, the cracked and spent stones being discarded in a growing heap beside the trough. Whether the purpose was cooking, bathing, textile processing, or something else entirely remains a matter of ongoing debate among researchers. What makes the Kealagowlane site particularly striking is the company it keeps. Within a radius of roughly eighty metres, there is a second burnt mound, a fulacht fia (a closely related type of site, the name coming from the Irish for "cooking place of the deer"), a cairn, and a stone circle. This concentration on a single bog-covered terrace suggests the area held sustained significance for the people who used it, though the exact relationships between the sites, and whether they were in use simultaneously or across different periods, is not recorded.