It may not be Stonehenge, but it's still pretty impressive (and a thousand years older): the 'hunebed' at Borger, built 5400 years ago by the funnelbeaker culture. It was used as a burial mound for important people -- it would have been covered with earth, with one or more entrances left open.
@SJohnRoss Yes! Several of these neolithic cultures are called after the shape or other aspects of their earthenware. Bell beaker culture, corded ware culture, globular amphora culture. Of course we have no idea how these people called themselves.