The Avebury Stone Circle, the West Kennet Long Barrow, The West Kennet Avenue and Silbury Hill are part of the “Stonehenge, Avebury and Associated Sites” UNESCO World Heritage Site. Constructed towards the end of the Neolithic, probably around 2500 BCE,  Avebury Hence has a diameter of about 430m. The banks of the henge’s earthwork are still up to 5 meters high in places, originally they would have been nearly 7 meters tall and between 20-30 meters thick. Within them an internal flat bottomed ditch, that would once have been up to 9 metres deep and over 20 metres wide, was cut into the underlying chalk and an estimated 200000 tons of chalk rubble hauled up to construct the bank with the central area of the henge accessible by four entrance causeways over the ditch.

Just inside the henge you can find the Outer Stone Circle, which, originally, was made up of 100 sarsen stones, ranging in height from 3-6 meters and weighing up to 20 tons. Unfortunately, many of these stones were pulled down in the 14th century and others were broken up in the early 18th century and used in the construction of Avebury village.  Today, only about 30 of the massive sarsen stones remain, the missing stones being marked by concrete blocks. Inside the Outer Stone Circle, two more stone circles can be found which are generally referred to as the North and South Circles. The South Circle originally was made up of 29 stones of which only 5 remain, while only 4 remain of the of the North Circle.