The classic Neolithic 'causewayed enclosure', with three concentric but intermittent ditches. Large quantities of animal bones found here indicate feasting, animal trading or rituals, or perhaps all three. Part of the Avebury World Heritage Site.
Windmill Hill is in the freehold ownership of The National Trust and in English Heritage guardianship. It is managed by The National Trust on behalf of English Heritage, and the two organisations share the cost of managing and maintaining the property.