Visible not to the naked eye on the ground but through aerial photography, a roughly circular cropmark, measuring around thirteen metres north-west to south-east and fourteen metres north-east to south-west, marks what was once a small hut. These cropmarks form when buried features affect soil moisture or nutrient levels, causing the grass or crops above them to grow at a slightly different rate, producing a ghostly outline that only becomes legible from height. What gives this particular mark its added interest is its setting: it lies within the southern quadrant of a levelled ringfort, a type of enclosed farmstead common across early medieval Ireland, typically consisting of an earthen bank and external ditch surrounding a domestic area.

The site sits on a slight rise with open views to the south-east, a position consistent with the practical preferences of early Irish settlement, where elevated ground offered both drainage and visibility. By 1837, when the Ordnance Survey produced its Fair Plan of the area, the earthwork was already understood as something significant, annotated simply as a fort, and depicted as a circular feature defined by a bank and fosse, that is, an earthen rampart and its accompanying ditch, with the smaller hut site marked within. In the intervening centuries, the ringfort itself has been levelled, almost certainly by agricultural activity, leaving only the cropmark trace of the hut to indicate that this corner of Ballynacarrow was once someone's dwelling place.