It looks, at first glance, like it might be an ancient enclosure, a ringfort or some prehistoric boundary. For years it was catalogued under exactly that suspicion, listed as a possible enclosure in the Sites and Monuments Record in 1992 and again in the Record of Monuments and Places in 1996. The 1921 Ordnance Survey six-inch map records it as a confident circular feature. In fact, it is almost certainly nothing older than the Georgian or Victorian era, and its purpose was purely aesthetic.

The structure is a circular enclosure roughly 18.7 metres in internal diameter, defined by a double-faced drystone wall, meaning the wall was built with two outer skins of stone rather than simply piled rubble, giving it a neat, finished appearance. The wall runs between 0.9 and 1.2 metres wide and stands 0.7 to 0.9 metres high where it has not yet fallen. Mature deciduous trees grow inside it now, along with dense undergrowth, but the whole arrangement points toward deliberate design rather than agriculture or defence. A near-identical feature sits approximately 60 metres to the north, and together the two enclosures are understood to have been ornamental landscape features laid out for the Newpark estate, the main house of which stands around 165 metres to the south-east. This kind of designed woodland feature was fashionable among landed estates of the eighteenth and nineteenth centuries, where circular or geometric plantings, walled garden rooms, and carefully composed woodland walks were used to give a sense of cultivated nature to the grounds.