In a field near Crooket in County Kildare, there is no visible monument, no earthwork, no stone, nothing that would catch the eye of a passing walker. What exists here is essentially a ghost, legible only from the air, and only under the right conditions.

The feature was spotted on 15 July 1991 by Dr. Gillian Barrett during an aerial photographic survey. The photograph, catalogued as GB91.DW.31, captured a cropmark, the faint but telling outline that buried archaeology sometimes leaves on the surface of growing crops, where differences in soil depth and moisture cause plants above a filled ditch or disturbed ground to grow at a slightly different rate or colour than their neighbours. What the photograph revealed was a ring-ditch, a roughly circular buried trench that in Irish prehistory is most often associated with funerary or ritual activity, sometimes the remnant of a ploughed-out burial mound whose central cairn or earthen core has long since been levelled by centuries of agriculture. Notably, it sits in close proximity to a rectilinear enclosure, a separate rectangular or square ditched feature whose own character and date remain unspecified in what is currently known about the site. The pairing of these two cropmark features in the same field raises questions about whether they were contemporary or simply accumulated over generations in the same patch of productive ground.