Stonehenge is a prehistoric monument in Wiltshire, England, 2 miles (3 km) west of Amesbury and 8 miles (13 km) north of Salisbury. Stonehenge's ring of standing 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.The site and its surroundings were added to UNESCO's list of World Heritage Sites in 1986.