At Kilbaha in County Kerry, there was once a rath, the Irish term for a ringfort, a type of circular earthen enclosure used as a farmstead and defended homestead throughout the early medieval period. Today, nothing of it remains above ground. No bank, no ditch, no hollow in the grass. The site exists now only as a coordinate and a name.

What makes the Kilbaha rath particularly interesting is the narrow window its cartographic history opens. When the Ordnance Survey mapped this part of north Kerry in the nineteenth century, the enclosure went unrecorded, absent from the original surveys of the 1840s. By the time a revised edition was produced in 1915, it had been added to the map, suggesting that either earlier surveyors missed it or that some trace was still legible in the landscape at the turn of the twentieth century. Shortly after, or perhaps sometime during the intervening decades, whatever remained was lost altogether. The site is documented in C. Toal's North Kerry Archaeological Survey, published in 1995, which places it among the wider pattern of earthwork enclosures scattered across the region, most of them remnants of the early medieval farming landscape that shaped much of rural Ireland between roughly the fifth and twelfth centuries.