This one in the townland of Islands, County Tipperary, offers almost nothing to the eye, and yet something is almost certainly there. The only real evidence is a circular cropmark spotted on an aerial photograph taken on 15 July 1970, part of the Cambridge University Collection of Aerial Photography. Cropmarks form when buried features, such as the filled-in ditches of an ancient enclosure, cause the vegetation above them to grow differently, often more lushly or more sparsely, depending on how the soil retains moisture. Seen from the air in the right season and light, these subtle differences in growth can trace the outlines of structures that have long since vanished at ground level.

The site sits in flat, reclaimed grassland in an upland area, with a river running along the northern side of the field and open views extending in every direction. On the ground, no surface trace of the circular feature survives, though there is a natural depression near the location of the possible enclosure. Other cropmarks visible in the same field appear to relate to agricultural drainage rather than anything of archaeological significance. What makes the site quietly interesting is that a comparable enclosure has been tentatively identified roughly one kilometre to the northwest, also associated with a depression near the cropmark. Whether these two features represent related settlements, boundary markers, or something else entirely remains an open question, one that aerial photography alone cannot resolve.