Megalithic monuments around the world

Around the same time as when the Ōyu Stone Circles were built (approx. 5,500–3,500 years ago), other monuments using big stones were raised in locations across the world. Based on their shape, megalithic monuments can be divided into menhirs, alignments, stone circles (cromlechs), and dolmens. Megalithic monuments sometimes also include the passage grave groups and gallery grave group across Western Europe as well as the cairns made from numerous small stones called kurgans in South Siberia.