What lies beneath a stretch of flat reclaimed pasture on the southern edge of Bruff, County Limerick, only becomes legible from the air, and even then only under the right conditions. A sub-rectangular cropmark, roughly 14 metres by 16 metres, betrays the outline of something buried in the soil, its presence revealed not by any upstanding stone or earthen bank but by the differential growth of the grass above it.

The site was first identified during the Bruff aerial photographic survey of 1986, catalogued as Bruff 59, reference AP5/2059. Cropmarks of this kind appear when buried features such as ditches or walls affect how deeply plant roots can reach, causing the vegetation above to green up or dry out at a different rate than the surrounding field, making the hidden geometry briefly visible from altitude. The earthwork sits 160 metres southwest of the Morningstar River, immediately east of a field drain that also serves as the townland boundary with Garbally. Two possible ditch-barrows, a type of prehistoric funerary monument defined by an encircling ditch, lie close by, one to the northwest and one to the southeast, suggesting this corner of Limerick may contain a loose cluster of early activity that has simply never broken the surface in any obvious way. The faint trace of the cropmark was still detectable on Ordnance Survey Ireland orthophotos taken between 2005 and 2012, and remained visible on a Google Earth image dated September 2019, compiled by Fiona Rooney as part of an archaeological record uploaded in March 2021.

There is no monument to visit in any conventional sense. The site sits on private agricultural land and presents as ordinary pasture. The most practical way to observe the cropmark is through the publicly available Google Earth imagery or the OSi orthophoto archive, where a careful eye and the right date of capture can pick out the sub-rectangular outline against the surrounding field. The proximity of the Morningstar River and the townland boundary drain are useful orientation points on a map. Those with an interest in aerial archaeology or the wider prehistoric landscape around Bruff may find it worth cross-referencing with the neighbouring ditch-barrow records to get a sense of how much of this landscape remains, for now, below the grass.