Stonehenge is a prehistoric stone monument located in England that is approximately 4,500 years old and dates back to the Neolithic period. It remains a mystery as to the monument's origins and purpose, though it was likely used as some kind of temple. Recent research using detailed surveys of the stones has revealed new information about how the stones were erected and arranged, as well as carvings and designs on the stones. While there is a myth that the stones were brought to the site by Merlin from Ireland, there is an element of truth to the story as some stones do actually come from Wales.