In a stretch of reclaimed pasture in Kildromin, County Limerick, a roughly thirty-metre-diameter cropmark is the only visible trace of what was probably an enclosure, a type of enclosed settlement or boundary feature common across early medieval Ireland. It appears in the grass rather than in the ground, the buried remnants of a circular ditch or bank causing the soil above to retain moisture or dry out at a slightly different rate than the surrounding field, producing a faint ring that only becomes legible from the air.

The site was first formally identified during the Bruff aerial photographic survey in 1986, recorded under the reference Bruff 129. It does not appear on any historic Ordnance Survey Ireland maps, which suggests the enclosure had already been levelled well before the nineteenth century, leaving nothing on the surface that a ground-level surveyor would have noted. Subsequent orthophotography taken between 2005 and 2012, along with a Google Earth image dated 20 September 2020, confirmed the cropmark was still legible under the right conditions. The enclosure sits in reclaimed pasture approximately fifteen metres west of a watercourse, and around 140 metres west of the townland boundary with Ballyvouden. A ringfort, a related but distinct monument type typically consisting of a raised circular earthwork used as a farmstead enclosure during the early medieval period, lies roughly 135 metres to the west, raising the possibility that this part of Kildromin once held a small cluster of enclosed activity, though the relationship between the two features remains unexamined.

There is nothing to see at ground level, and the field is working farmland, so access would require the landowner's permission. The cropmark is most likely to be visible from the air, or in aerial imagery, during dry spells in late summer when differential soil moisture shows up most clearly, which explains why the Google Earth capture from late September 2020 was productive. Anyone researching the site should consult the Bruff aerial photograph archived under AP 4/3632, which remains the primary documentary evidence. The record was compiled by Martin Fitzpatrick and uploaded to the Sites and Monuments Record in April 2021.