Marden Henge - Credit: Wikimedia Commons
Marden Henge (also known as Hatfield Earthworks) is the largest Neolithic henge enclosure discovered to date in the United Kingdom.Dyer, 2001. p. 191. The monument is north-east of the village of Marden, Wiltshire, within the Vale of Pewsey and between the World Heritage Sites of Avebury and Stonehenge.Leary & Field, 2010. p. 10. Read more on Wikipedia
Source: en.wikipedia.org