Stonehenge is one of the world’s most famous prehistoric monuments, built 4,500–5,000 years ago during the Neolithic in a time long before written history. The recent dramatic discovery of a dismantled stone circle near the sources of some of Stonehenge’s stones in southwest Wales raises the fascinating possibility that an ancient story about Stonehenge’s origin, written down 900 years ago and subsequently dismissed as pure invention, might contain a grain of truth. This article explores the pros and cons of comparing the legend with the archaeological evidence.