The one at Corbally, in County Galway, does almost the opposite. Sitting in low-lying grassland, it survives as little more than a suggestion, a barely perceptible rise tracing an almost circular outline roughly nineteen and a half metres east to west and eighteen and a half metres north to south.

A rath, as this type of monument is classed, was typically a circular or near-circular enclosure defined by an earthen bank and ditch, used as a farmstead or dwelling during the early medieval period, broadly the fifth to twelfth centuries. Thousands survive across Ireland in varying states of repair, but Corbally's example sits at the more eroded end of that spectrum. The defining bank is described as low, and the overall form very poorly preserved, leaving a monument that registers more as a faint undulation than any commanding feature of the landscape. What it lacks in presence, though, it compensates for in the quiet curiosity of its near-invisibility, a piece of early medieval occupation reduced by centuries of agriculture and weather to something a casual eye would pass without pause.