It has no marker, no signage, and no obvious surface trace. The only way to know it exists at all is to look down from the air, or to study satellite imagery taken on the right day, when the grass above its buried outline grows just differently enough from the surrounding field to betray the shape of something ancient beneath.

The enclosure at Mountminnett came to light in 1986, when the Bruff aerial photographic survey captured a clearly circular cropmark from above, logged under reference Bruff 155 (AP 4/3663). Cropmarks of this kind form when buried features, such as the filled-in ditches or compacted banks of a former enclosure, affect how deeply plant roots can reach into the soil, causing the vegetation above them to ripen or stress at a slightly different rate to the field around them. The effect is subtle and seasonal, most readable during dry spells when moisture stress makes the contrasts sharper. Subsequent satellite orthoimages taken between 2005 and 2012 confirmed the shape clearly, and fainter traces appeared again in Digital Globe imagery from 2011 to 2013 and in a Google Earth image dated 28 June 2018. The monument was compiled into the archaeological record by Alison McQueen and Vera Rahilly, uploaded in September 2020. Approximately 220 metres to the south-east lies a ring-barrow, a low circular earthen mound typically associated with prehistoric burial, suggesting this corner of low-lying Limerick farmland was once a more significant landscape than the drained and divided fields now suggest.

The site lies on improved wet pasture cut through by land drains and watercourses, with a watercourse running some 35 metres to the east. There is nothing to see from the road or the field margin. Anyone interested in the site would do best consulting the OSi orthoimages or Google Earth rather than making a visit in hope of visible remains. Dry summers offer the best chance of the cropmark reasserting itself in aerial or satellite views. The neighbouring ring-barrow to the south-east may be more detectable on the ground, though both monuments serve as a reminder of how much of the Irish archaeological landscape exists only as shadow, readable from altitude but otherwise absorbed entirely into the working countryside.