Roughly nine and a half metres across, it is defined by a low earthen bank and a shallow external fosse, the fosse being a ditch dug around the outside of an enclosure, which together barely break the surface of the surrounding pasture. Locally, the feature is not called an enclosure at all. It is known as a tree ring, a name that preserves a memory of what once grew here: five beech trees, planted inside the bank, which would have made the circular form immediately legible to anyone passing by.

The archaeology is modest by most measures. The bank rises only about twenty centimetres above the interior and twenty-five centimetres above the outer ground level, and the fosse is a mere fifteen centimetres deep. These are not the dimensions of a defensive structure. Circular earthen enclosures of this kind appear across Ireland in a variety of forms and periods, and their purposes range from early medieval settlement enclosures to post-medieval garden or ornamental features. The planting of trees within this one, noted through local tradition rather than any excavation record, suggests it may have had a designed or decorative function connected to the nearby house and its grounds. What the five beeches looked like, when they were planted, or when they disappeared, is not recorded. A second circular enclosure sits about 260 metres to the north, in the next field, raising the possibility that the two features were understood together at some point, though the relationship between them remains unexplained.