It is thought ancient Britons built the massive monument as a religious site, to study and celebrate the movements of the sun and moon, or as a place of burial or healing.
The summer and winter solstices hold particular significance for Pagans.
The summer solstice is celebrated as a “time of plenty and celebration”, according to the Pagan Federation, while the winter solstice is deemed even more important because it marks the “re-birth” of the sun for the new year.
Source: Summer solstice 2017: Stonehenge crowds as sun rises – BBC News