It does not rise from the ground in any dramatic way, and no signpost marks it out. Instead, it appears only from above, as a cropmark, the faint but telling discolouration that forms when buried archaeological features influence the growth of whatever happens to be planted overhead. Grass or grain above a filled-in ditch or the remains of an earthen bank will grow slightly differently to the surrounding crop, and from a sufficient height those variations resolve into shapes. In this case, the shape is a circle roughly 28 metres in diameter.

Cropmarks of this kind are one of archaeology's more quietly remarkable tools. They do not require excavation or even a site visit to identify; in many cases they have been spotted by researchers combing through satellite imagery and aerial photography. This particular earthwork in Gortavalla North came to wider attention through a Google Earth orthoimage, a georeferenced aerial photograph that allows features on the ground to be measured and mapped with reasonable accuracy. The record was compiled by Caimin O'Brien, drawing on details provided by Jean-Charles Caillère, and uploaded in November 2021. The underlying monument, a roughly circular earthwork, is likely the remains of a ringfort, the most common type of early medieval enclosed settlement in Ireland. Ringforts, sometimes called raths or lios, were typically defined by one or more earthen banks and ditches enclosing a domestic space, and many thousands of them survive across the Irish countryside, though a considerable number are now levelled and detectable only through aerial survey.

Because this site is known entirely from remote sensing rather than ground investigation, there is little to observe on a visit without detailed local knowledge and the right conditions. Cropmarks are most visible from the air during dry summers, when soil moisture stress makes buried features stand out most sharply against their surroundings. At ground level, the field in question would appear unremarkable to the casual eye. Anyone with a particular interest in researching the site further would do well to consult the National Monuments Service records for County Limerick, where details of this and surrounding sites are maintained. The townland name, Gortavalla North, itself worth noting, derives from the Irish and points to the layered place-name history that frequently accompanies sites of this age.