Stone circles

These are big natural stones arranged in circles, at times in two or three layers. Some have a diameter of 50 m while others are as small as 1 m. Some make up the outer border of individual graves as part of the tombs, some have the erected stones themselves likely being the grave or object of faith, and others clearly are not graves. The Stonehenge in the UK is thought to be a ritual site related to sun worship because the central altar stone is placed with a deep connection to the direction of the rising midsummer sun. Stone circles can be found on the European continent, in the UK, in Iran, in South India, in Siberia, and in many other places across the world.