What makes it quietly odd is that this shape is almost certainly deliberate. A tree-ring is a feature of designed landscapes, a plantation of trees arranged in a ring or dense circle, typically created by landowners in the eighteenth or nineteenth century to provide shelter, visual structure, or simply ornamental effect on an otherwise open hillside. They are scattered across the Irish countryside, often overlooked because they read at first glance as natural woodland.

The Ordnance Survey six-inch maps of 1839 and 1924 both mark the enclosure clearly, showing trees and a house within the interior. The consistency across those two editions suggests the feature was well established by the time the first survey was carried out, and had persisted largely intact into the twentieth century. A small stream rises about twenty metres to the east, flowing south to north along the base of the slope, which may have influenced the placement of the planting as much as any aesthetic consideration. The site lies at Kilmacdermot, and while the name of whoever originally laid it out is not recorded, the design speaks to the kind of deliberate landscape shaping that was common on Irish estates of that era, where even modest enclosures were given a considered form.