At Arda Mór, on a north-west facing slope above the Lispole valley in Co. Kerry, the Ordnance Survey maps mark a ringfort, yet on the ground there is nothing to see. No earthen bank, no ditch, no curve of raised ground hinting at what once stood there. The site is, in a very real sense, defined by its disappearance.

A ringfort, or rath, is one of the most common monument types in the Irish landscape: a roughly circular enclosure bounded by one or more earthen banks and ditches, typically dating from the early medieval period and used as a farmstead or settlement. This particular example was classed as univallate, meaning it had a single enclosing bank. According to the Dingle Peninsula archaeological survey published by J. Cuppage in 1986, no visible trace of the enclosure survives. Whether it was levelled by agricultural clearance, absorbed gradually into the working land of the slope, or simply eroded away over the centuries is not recorded. What remains is its outline on a map and a grid reference pointing to a hillside above a quiet Kerry valley, the archaeology reduced to a cartographic memory.