Detail of Stonehenge, Wiltshire, England.
Archaeologists believe the standing stones were built anywhere from 3000 BC to 2000 BC. Radiocarbon dating in 2008 suggested that the first stones were raised between 2400 and 2200 BC, whilst another theory suggests that bluestones may have been raised at the site as early as 3000 BC. (Courtesy of Wikipedia.)
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