Stonehenge is a UNESCO World Cultural Heritage since 1986, and for many people it is a mystical place. A vast number of stories, sagas and theories exist about this site. Stonehenge is made up of a megalithic structure which encloses a tomb group. Around 3100 B.C. the first construction work began and took about 2000 years until the final completion. There are still discussions about the utilization. Among other things one assumes it is used as an observatory.