Some scholars believe the monument as a ritual memorial ritual, others, like the astronomical observatory of a religion, to calculate the station, to see eclipses, etc. Says that it was used as a calculator of stone and the work was done to enable the observation of astronomical phenomena.
No one knows who built Stonehenge, and the popular theory that would have been the druids today rejected because the monument was completed 1 000 years before the druids take power. However, the archaeologists noted the almost complete absence of garbage on the spot and that is an indicator that the site was sacred ground
I think that Stonehenge was built to people look the stars, the sky, the moon, etc. And it was a astronomical observatory. I think that it was built with a machine that people of the time reversed to carry very heavy things