A model of Avebury in Wiltshire with its stone circle and henge

Avebury henge and stone circles are one of the greatest marvels of prehistoric Britain. Built and much altered during the Neolithic period, roughly between 2850 BC and 2200 BC, the henge survives as a huge circular bank and ditch, encircling an area that includes part of Avebury village. Within the henge is the largest stone circle in Britain - originally of about 100 stones - which in turn encloses two smaller stone circles.