It is one of the most famous prehistoric monuments in the world from ~3000 BC. Consists of an inner circle and an outer circle of stones

It was probably built for sun worship by pre-Celtic people but was taken over and used by the Celtic Druids ~6th c. BC. On Midsummer's Day the Hill Stone (a few metres from the outer circle on the ceremonial road)  casts a long shadow through the centre. The stones originate from Wales.  It is a mystery how they were brought so far.

 

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