Stonehenge is one of the best known ancient wonders of the world. The 5,000 year old henge monument became a World Heritage Site in 1986. Despite numerous theories, no-one knows for certain the reason why Stonehenge was built. The stones that form the inner ring came from the Preseli Mountains in Wales. It is not known for sure how ancient man overcame the engineering hurdles and managed to move these great stones to the henge. But one thing is certain - it required an amazing effort by ancient people to realise this stunning monument. The stones have inspired many legends and folklore over the centuries as people try to explain the origins and function of the henge. Stonehenge has been variously described as the work of giants, gods, wizards and the devil himself. View the BBC webcam of Stonehenge | 
