Archeologists believe it could have been a burial ground dating back to 3000 BC.
The purpose of Stonehenge remains a mystery. Archeologists believe it could have been a burial ground dating back to 3000 BC. It could have also served as a Neolithic calendar (as the layout of the stones is set to mark sun movements), a religious place, or a scientific observatory. The stones, which weigh an estimated 25 tons each, were transported at least 19 kilometers to their current location.