Stonehenge may be a rebuilt stone circle from Wales

[left-of-center2012]

12. "I saw a documentary ..."

I saw a documentary, maybe PBS, that said there was an annual festival at Stonehenge.
They found evidence from old trash piles.

And from what was found they believed people came from all over the British Isles, walking for days,
and driving herds of domesticated animals to be slaughtered there.

Some of the animals were only raised at the time in what is now most northern Scotland, or Ireland.

Tribes (?) may have been at war with each other during the year but held a truce for the festival.