Stonehenge is one of the best known and yet most enigmatic prehistoric sites in the world.

Clearly a sacred site, nothing is left to tell us how the stone circle was used. It may have been built as an astronomical observatory or for rituals linked to the sun, successful crops or the dead.

It evolved from a simple bank and ditch in the Neolithic period (3000BC) to a very sophisticated stone circle, built on the axis of the midsummer sunrise and rearranged several times during the Bronze Age (from 2600 to 1600BC).