Within a radius of roughly two hundred metres, two other ringforts occupy the same stretch of Westmeath grassland, one to the south-southwest and one to the east-southeast. Clustering of this kind was not accidental; in early medieval Ireland, ringforts, which were typically enclosed farmsteads defined by an earthen bank and surrounding ditch, often appeared in groups reflecting family landholdings or dynastic territories. Finding three in such close proximity is a reminder that what looks today like an empty field was once a quietly organised landscape.

The Farrancallin example sits on a slight natural rise, ringed by higher ridges, a position that would have offered modest elevation without commanding drama. The enclosure is roughly circular, measuring approximately 28 metres north to south and 26 metres east to west. It is defined by an earthen bank and a shallow external fosse, the fosse being the ditch dug to throw up the bank material. Time has been hard on both features: the bank survives best at the northwest, and elsewhere has eroded to little more than a scarp, a low slope where the original face has slumped. A possible entrance can be read at the north-northeast, where a slight depression about 1.8 metres wide interrupts the scarp. Along the southeastern to western arc, a field fence has been built directly onto the monument's perimeter, a common fate for earthworks absorbed into working farmland over centuries.

For anyone walking the area, the flatness of what remains is the main challenge. The raised platform is perceptible underfoot rather than obvious to the eye, and it takes a moment of stillness to appreciate the geometry of the place, and then to look south and east and locate, in the middle distance, the ground that once held its neighbours.