It is invisible at field level. The only way to see it is from above, and even then only under the right conditions: the cropmark, the faint differential in how crops grow over buried features, appeared in a Google Earth image captured on 14 July 2018.

What that image revealed is a subrectangular enclosure defined by two fosses, the term for the ditches dug to create a boundary or defensive circuit around a settlement or enclosure. The internal dimensions run roughly 35 metres on the north-west to south-east axis and around 30 metres north-east to south-west, with external dimensions of approximately 50 by 40 metres. It sits towards the bottom of a south-east facing slope, with the River Slaney running roughly 140 metres to the south-east. The north-east side may have been partially cut through or obscured by a later field bank, which would explain why the outline appears incomplete. The site was first reported by Simon Dowling, whose attention to aerial imagery brought it to wider notice.