Located just to the west of the A345, between Larkhill and Amesbury, this site was discovered by aerial photography between the wars. It is a Neolithic ceremonial monument (dating from about 2300 BC) and consisted of concentric rings of wooden posts possibly forming a roofed building or a wooden Stonehenge-type monument. It is thought that there may have been nearly 40 similar wooden structures in the ancient kingdom of Wessex - some of them much bigger.