England 4
Image by fitzcoraldo

Rockrich wrote:
I seem to recall the Druids Altar ‘four-poster’ status being a little dodgy too.
http://megalithix.wordpress.com/2009/04/25/druids-altar-bordley-north-yorkshire/

See page for Danby Rigg. This curious circle now only has one large stone inside it. But in the late c.19th, Canon Atkinson said there were four.