The site looks, to the casual eye, like ordinary reclaimed grassland. But viewed from above, a circular form emerges from the soil, a cropmark tracing the outline of an enclosure roughly 45 metres across its outer edge and 30 metres across the interior, defined by at least two concentric ditches. This kind of feature, where buried archaeological deposits cause overlying crops or grass to grow at subtly different rates, can remain entirely invisible at ground level while appearing with striking clarity in aerial or satellite photography.

What makes this site particularly interesting is the layering of different historical moments compressed into a single patch of ground. The Ordnance Survey six-inch map of 1840 records the area not as productive land but as marshy ground, specifically annotated as 'Liable to Floods'. That the land was later drained and brought into agricultural use means the enclosure beneath was covered over and largely forgotten. A field boundary running north to south cuts across the eastern side of the enclosure, and because that boundary post-dates 1700, it gives a useful lower limit; the enclosure itself was already there, already buried, before that line was drawn across the landscape. The circular form, with its double-ditch arrangement, is broadly consistent with the kind of enclosed settlements, sometimes called ringforts or raths, that were built and occupied across Ireland from the early medieval period onward, though without excavation the precise date and function of this particular example cannot be confirmed.

The site was compiled by archaeologist Caimin O'Brien and uploaded to the record in May 2020, drawing on Digital Globe orthoimagery captured in March 2016 and September 2018. Those two images, taken at different times of year and in different ground conditions, both show the earthwork outline clearly, which suggests the feature is reasonably well-preserved beneath the surface. There is nothing to see at ground level, and the site sits on private agricultural land, so any visit would require landowner permission. The most accessible way to observe the enclosure is through freely available satellite imagery; searching the Brickfield townland area in County Limerick on Google Earth, particularly using historical imagery layers, will bring the circular outline into view.