Stone circles conjure up a lost world of mysterious ceremonies, druid astronomers, pagan dances and inquisitive antiquarians. The most famous is Stonehenge in Wiltshire, UK, but it is also the most unusual in that it has lintels and trilithons in its design.
Most stone circles are not so glamorous, but given that over one thousand of them dated to between 3500 BC and 1500 BC have been found in the British Isles alone, their construction was evidently an important part of our ancient culture.
Stonehenge is also known for its summer solstice sunrise, and research over the last 60 years has shown that many other circles not only use sky and landscape alignments to mark astronomical events, but also share geometrical forms and measurement systems.
Read more via Stone Circles: A Worldwide Phenomenon — Humans Are Free