Stonehenge is a prehistoric monument located in Wiltshire, England. It consists of a circular arrangement of massive standing stones, each weighing several tons. The site is believed to have been constructed between 3000 BC and 2000 BC, and its purpose remains a subject of debate among historians and archaeologists. The stones are arranged in a way that aligns with the movements of the sun, suggesting it may have been used for astronomical observations or religious ceremonies. Stonehenge is a UNESCO World Heritage Site and attracts many visitors each year, making it one of the most famous landmarks in the United Kingdom.