From satellite imagery, however, a different picture emerges. On Google Earth footage captured on 28 June 2018, a circular mark roughly five metres in diameter appears pressed into the earth, its outline rendered visible only because growing crops react differently above disturbed or compacted soil beneath them. These cropmarks, as they are known, are one of the quieter ways that buried archaeology announces itself to the modern world.

The mark at Clomantagh is understood to be a ring-ditch, the circular trench that once surrounded a prehistoric burial mound or barrow. Barrows were funerary monuments, typically raised during the Bronze Age, and the ditch around their base was both a structural and possibly a ritual boundary. What makes this particular site more than an isolated curiosity is its immediate context. At least four other ring-ditches have been identified in the same area, suggesting that this small circular feature sits within a wider barrow complex, a cluster of monuments that may represent a prehistoric burial landscape used over generations. The site was identified and reported by Simon Dowling, and the ring-ditch appears to sit on the perimeter of a separate enclosure already recorded in the same townland.