The only record of it comes from the air, where the buried feature betrays itself as a cropmark, the kind of faint discolouration that appears in growing crops when their roots reach into disturbed or differently composed ground below. A cropmark of this sort is often the sole surviving trace of a ring-ditch, a type of circular enclosing or funerary feature commonly associated with prehistoric burial and ritual activity across Ireland and Britain.

An aerial photograph taken on 13 July 1989 captured this particular feature, along with two others close by. The three ring-ditches are tightly grouped: a second lies roughly seven metres to the south-south-east, and a third approximately twenty-six metres to the south. Such clustering is not unusual in the Irish archaeological landscape, where ring-ditches frequently appear in loose associations, perhaps reflecting repeated use of a place over generations, or the gradual accumulation of burials within a shared sacred area. Without excavation, the precise date and function of any individual ring-ditch remains difficult to establish, though many in Ireland belong broadly to the Bronze Age. The Swiftsheath examples remain unexcavated, their interiors and any contents entirely unknown.