<Tr> <Th> Reference no . </Th> <Td> 373 </Td> </Tr> <Tr> <Th> Region </Th> <Td> Europe and North America </Td> </Tr> <P> Stonehenge is a prehistoric monument in Wiltshire, England, 2 miles (3 km) west of Amesbury and 8 miles (13 km) north of Salisbury . It consists of a ring of standing stones, with each standing stone around 13 ft (4.1 metres) high, 6 ft 11 in (2.1 metres) wide and weighing around 25 tons . The stones are set within earthworks in the middle of the most dense complex of Neolithic and Bronze Age monuments in England, including several hundred burial mounds . </P> <P> Archaeologists believe it was constructed from 3000 BC to 2000 BC . The surrounding circular earth bank and ditch, which constitute the earliest phase of the monument, have been dated to about 3100 BC . Radiocarbon dating suggests that the first bluestones were raised between 2400 and 2200 BC, although they may have been at the site as early as 3000 BC . </P>

Where is the ancient stone circle called stonehenge