Avebury: "it does as much exceed in greatness the so renowned Stonehenge ... as a cathedral doeth a parish church". So wrote John Aubrey in 1663. Aubrey was one of the first antiquarians to systematically examine and document the huge Neolithic henge monument at Avebury in Wiltshire, England. In this episode we will explore the largest prehistoric stone circle in the world, examining the mysterious standing stones, the secret alignments and the enormous earthworks - monuments that are over 5,000 years old and give clues to the very first dawning of settled life in Britain.