No earthwork rises from the soil, no stone marks the spot. The only way to see it is from above, and even then, only under the right conditions: the feature survives as a cropmark, a faint trace preserved in the differential growth of whatever crop happens to be growing when aerial or satellite imagery captures the field at the right moment in the season.

The circle is interpreted as a ring-ditch, a class of monument typically consisting of a circular fosse, or ditch, cut into the ground and often associated with Bronze Age burial practices. The enclosed area may once have covered a cremation deposit, a flat grave, or some other form of ritual activity, though nothing visible at the surface survives to confirm this. What does survive is the shadow of the original fosse, detectable because soil that was once disturbed retains moisture differently from undisturbed subsoil, causing the vegetation above it to grow and colour in a subtly different way. The Ballinastraw example was first reported by Jean Charles Caillére, and as of 2022 it remained visible only through the iMAPS aerial mapping platform, meaning it had gone unrecorded in any earlier survey.