Not sure where to post this but I guess here is as good a place as any.
I watched a documentary on TV last night about Stone Henge and it showed what archaeologists thought Stone Henge looked like when it was built ie a full stone circle with lintels.
If this is so, what happened to the rest of the stones that would have made up the circle? Even given that there are some on the ground I dont think there were enough stones to make the circle depicted.
I would imagine the stones would make valuable building material and have been 'utilised' over time for other projects. Occasionally some are re-discovered such as here