In 2012, The Discovery Programme carried out a geophysical survey of the island's South Point as part of their 'Late Iron Age and "Roman" Ireland' project, a research programme examining the period roughly spanning the last few centuries BC through to the early centuries AD. The survey, conducted under Licence no. 12R078 and reported on by Dowling in 2014, identified six features described as annular, penannular, and arcuate in form, meaning roughly circular, near-circular, and arc-shaped in plan. Their diameters range from seven to sixteen metres, and several of them overlap, suggesting either extended use of the site across time or successive phases of burial activity. On the basis of that size, form, and spatial arrangement, the features were provisionally identified as ring-ditches. Ring-ditches are the ploughed-down or eroded remains of circular earthen monuments, often Bronze Age or Iron Age in origin, and are frequently associated with funerary use, representing the outer ditches of barrows or low burial mounds whose above-ground material has long since vanished.

Lambay is a private island and access is not straightforward; it is not open to casual visitors without prior arrangement, which means this site sits well beyond the reach of a casual day trip. The features themselves are subsurface and would not be visible on the ground in any case, having been detected through geophysical methods rather than excavation or surface survey. What a visitor with the relevant permissions might notice at South Point is simply a grassy coastal headland, with nothing to betray the overlapping circles recorded beneath it. The significance of the site lies precisely in that gap between appearance and archaeology, between what the ground shows and what instruments suggest is sleeping just below it.