There is not much that can be added to what is already posted. All I would say is if you have never been here – visit. This is an incredible place to visit – the circle is massive – the stones huge. I have been to many famous prehistoric sites on mainland Britain but for me, Avebury is the best. Not just the circle but Silbury Hill, WKLB, Windmill Hill etc. Visit as often as you can – stay as long as you can. You will not be dissapointed.