Which large stone monument in England is arranged in a circle?

Stonehenge is the world’s best-known ancient stone circle, lying at the heart of one of the richest archaeological landscapes in Europe. Built around the same time as the Great Pyramid in Egypt, 4,500 years ago, the finished monument of massive and finely dressed sarsen stone was unlike anything ever seen across Europe. It is a powerful memorial to a key period of British and European history, a time of transformations when landscape was being monumentalised in completely new ways as part of communities’ changing relationships with the land.

Source: English Heritage