This one in Killadullisk, County Galway is different: it marks a place where something used to be. A rath, the Irish term for a roughly circular earthen ringfort of the early medieval period, once occupied a low hummock in open grassland here, its oval outline stretching roughly 35 metres north to south and 25 metres east to west. A raised bank would have defined its perimeter, with a shallow external fosse, essentially a ditch, running around the outside. Locals knew it simply as "the fort", that quiet folk memory that so often outlasts the physical remains themselves. Sometime in the early 1990s, it was levelled, and today no visible trace survives at ground level.

Ringforts were the dominant settlement type in early medieval Ireland, typically enclosing a farmstead and its associated buildings within an earthen or stone bank. Many thousands survive across the country in varying states of preservation, and they were once so numerous that they became embedded in local placenames, folklore, and landscape memory. The Killadullisk example was recorded on the Ordnance Survey six-inch maps, which documented the Irish countryside in extraordinary detail from the mid-nineteenth century onward, capturing earthworks and enclosures that were still legible in the landscape at that time. That cartographic record is now among the few traces of the monument's existence. A second possible rath was noted approximately 80 metres to the north-east, suggesting that this corner of south Galway may once have supported a small cluster of early medieval settlement, though that companion site's status remains uncertain.