It measures twelve metres by six, with a central depression about two and a half metres wide opening northward toward a nearby water source. To most eyes it would read as little more than a grassy rise in the rock, but its shape and orientation point toward something considerably older and more deliberate.

The feature is a possible fulacht fiadh, a type of prehistoric cooking site found in great numbers across Ireland. The classic form involves a trough, a mound of fire-cracked stone, and a water supply: stones would be heated and dropped into the water-filled trough to bring it to a boil, a method thought to date from the Bronze Age. The horseshoe mound here follows that familiar pattern, oriented toward an existing water source exactly as the type demands. What is absent, notably, is burnt stone, the usual signature material of these sites, which makes a definitive identification harder to confirm. The site came to light between 2014 and 2018 during the AranLIFE Farming Project, an EU-funded initiative focused on the traditional farming landscape of the Aran Islands, suggesting that even well-studied island environments can still yield unrecorded archaeology when looked at closely enough.