Codford Circle - Credit: Wikimedia Commons
Codford Circle, also known as Wilsbury Ring, Woldsbury, and possibly Oldbury Camp, is a neolithic hill top enclosure or possible hillfort located on the summit of Codford Hill, a chalk promontory of Salisbury Plain, near to the village and civil parish of Codford, in Wiltshire, England. Read more on Wikipedia
Source: en.wikipedia.org