At Ballycullane in County Wexford, there is no visible earthwork to walk around, no bank to scramble up, no ditch to peer into. What survives instead is a cropmark, the faint trace left in growing crops when buried features beneath the soil cause uneven moisture and nutrient levels, making the outlines of long-vanished structures legible only from the air.

Aerial photographs reveal a circular enclosure roughly 40 metres in diameter, defined by a single fosse, which is a ditch, cut into the ground. A gap on the southern side marks what would have been the entrance. The site sits at the southern end of a low ridge running roughly north to south, a position typical of the practical logic behind ringfort placement: enough elevation to survey the surrounding land, without the exposure of a hilltop. Ringforts, known in Irish as raths when defined by earthen banks, were the dominant form of enclosed rural settlement in early medieval Ireland, broadly between the fifth and twelfth centuries. Most housed a single farming family and their livestock. Thousands survive across the country in varying states of preservation, but a significant number, like this one, have been levelled by centuries of agriculture, leaving only the buried ditches to betray their former presence.