It is the kind of feature that catches the eye precisely because it looks deliberate, purposeful, the sort of ringfort or enclosed settlement that dots the Irish landscape in the thousands. The problem is that the ground itself seems to argue against it.

The terrain here is flat, poorly drained, and prone to waterlogging, the kind of reedy, wet ground that would have made a poor choice for a defended farmstead or any structure requiring a firm foundation. Ringforts, the circular enclosures most commonly found across Ireland and typically dating from the early medieval period, were almost always sited on reasonably dry, workable land. The location at Ballyneill fits that pattern so poorly that one plausible explanation is simply that the mapmakers recorded a grove of trees planted on marshy ground, and that the circular form was the shape of the planting rather than any earthen bank or ditch. By the time later Ordnance Survey editions came to record the same area, no surface traces of an enclosure remained at all. Whatever was there, or was never quite there, has since vanished entirely into the wet ground.