Standing in the pasture on the north-western slope above Lough Derravaragh, there is nothing to indicate that the ground beneath your feet once formed the interior of a ringfort, a type of circular enclosed farmstead that was the most common form of rural settlement in early medieval Ireland. No bank, no ditch, no trace of a gateway. The field looks like every other field. And yet, an aerial photograph taken in November 2011 revealed what the eye at ground level cannot: a clear cropmark, where the buried remains of the enclosing earthwork cause the grass above to grow at a subtly different rate, drawing the vanished structure back into visibility from altitude.

By the time anyone looked carefully at this site, the damage was long done. A field report from 1975 found the monument already reduced almost to nothing: a circular area roughly 45 metres north to south and 42 metres east to west, still faintly outlined by the ghost of an earthen bank, which at its most visible point on the south-eastern arc measured just 6.5 metres wide and 0.2 metres high. That is barely a ripple in the soil. There were also very slight traces of an outer fosse, a shallow defensive ditch that would originally have run around the outside of the bank. At some point after 1837, a field fence was laid straight across the site from north-east to south-west, bisecting it entirely, which gives a rough earliest date for when the last recognisable traces were being obliterated by ordinary agricultural use. Some 160 metres to the north-east lies another levelled ringfort, suggesting this corner of County Westmeath once held a small cluster of such enclosures, perhaps farmsteads occupied by related families across the early medieval centuries.