On an aerial photograph taken on 13 July 1966, a ring-ditch reveals itself as a circular cropmark roughly 15 metres in diameter. Cropmarks form when buried features, such as ditches filled with looser soil, encourage slightly different growth in the crops or grass above them, creating patterns that only become apparent when viewed from altitude. This one would almost certainly go unnoticed by anyone simply passing through the field.

Ring-ditches of this kind are generally interpreted as the ploughed-down or eroded remains of prehistoric burial monuments, often Bronze Age round barrows, where the surrounding ditch is all that survives of what was once a more substantial earthwork. The mound itself has long since been levelled by centuries of agriculture, leaving only this faint circular scar in the soil. What makes the Parks example quietly interesting is its proximity to a separate enclosed site lying approximately 80 metres to the north-east, suggesting that this particular stretch of ridge was a place of some significance across a long period, with different features accumulating in close relationship to one another, though the precise nature of that relationship remains unresolved.