In the pastureland of Kylenagappa, on a north-facing slope of a low hillock in County Galway, there is a circular enclosure roughly 28 metres in diameter. Or rather, there was. No visible surface trace survives today, and the only reliable record of its existence comes from the Ordnance Survey six-inch maps, the painstaking nineteenth-century cartographic project that documented Ireland's landscape in extraordinary detail before much of it changed beyond recognition.

Circular enclosures of this kind are a common enough feature of the Irish countryside, typically interpreted as the remains of a ringfort, a type of enclosed farmstead used from the early medieval period onwards. A ringfort usually consisted of an earthen bank and ditch encircling a domestic space, and many thousands of examples were recorded across the country, though a significant proportion have since been lost to agriculture, development, or simple erosion. What makes the Kylenagappa example quietly notable is precisely its absence. The OS surveyors saw something worth marking on their maps, a defined circular form on that gentle hillside, but the ground today offers nothing to confirm it. Whatever earthwork once defined this space has been absorbed back into the pasture, leaving only a cartographic ghost.