It exists, for now, only as a cropmark, one of those ghostly impressions that appear in aerial photography when buried archaeology causes the vegetation or soil above it to respond differently to drought or growth. The enclosure at Newdown came to light in satellite imagery captured on 2 July 2018, when conditions were evidently right for the buried features below to betray themselves from above.

What the imagery reveals is a bi-vallate enclosure, meaning one defined by two concentric circular ditches or banks rather than a single boundary. Roughly circular in shape and approximately 49 metres in diameter, it sits within the broader class of enclosed sites that are found across Ireland in considerable numbers, though most were built up during the early medieval period. The double-walled form was often associated with higher-status settlements, where an inner enclosure might contain a dwelling and an outer one provided additional protection for livestock or dependants. Whether that interpretation fits here is unknown. The site has not been excavated, and its date and function remain a matter of inference. It was identified through aerial analysis by Jean-Charles Caillère and documented shortly afterwards.