It is not much to look at from a distance, barely rising above the surrounding grass, yet it represents one of the most common prehistoric monument types in Ireland. This is a fulacht fia, a Bronze Age cooking site, and there are thousands of them scattered across the Irish landscape, the majority concentrated in Munster.

The principle behind a fulacht fia is straightforward: a trough, usually dug into the ground and sometimes lined with timber or stone, was filled with water. Stones were heated in a nearby fire, then dropped into the trough to bring the water to a boil. Food, probably wrapped in straw or hide, was then lowered in to cook. The spent, shattered stones were thrown aside after each use, and over decades or centuries of repeated activity, they accumulated into the characteristic horseshoe or oval mounds that survive today. The mound at Garraun measures roughly 11.6 metres north to south and 10.8 metres east to west, a modest but respectable example of the type. Critically, there is a spring to the east of the site, which would have provided the reliable water supply these cooking places depended upon. That proximity to a water source is almost universal among fulachtaí fia, and finding one nearby is often the clearest clue to why a particular spot was chosen.