Do you know that Stonehenge is not only one of Britain's (famous) historical places but also one of its greatest (mystery). But no one knows who (build) Stonehenge. For many years, historians believed Stonehenge was a temple where ancient leaders tried (communicate) with the gods. However, historian Paul Stoker thinks this can't be true because Stonehenge (build) so many centuries ago. Another popular idea is that Stonehenge might be a kind of calendar. The large stones were put together a certain way. On midsummer's morning, the sun shines (direct) into the center of the stones. Other people (believe) the stones have a medical purpose. They think the stones can prevent (ill) and keep people healthy. No one is sure what Stonehenge was used for, most agree that the position of the stones must be for a special purpose.