Experts have always believed that Britain's most iconic ancient monument was designed as a burial site. Two years ago a radical new theory emerged suggesting that Stonehenge was a place of healing rather than interment - a Bronze Age equivalent of Lourdes. During the first dig at the site in 50 years, archaeologists use forensic testing to see if they can unearth enough evidence to support their theory of the healing stones. NEW SEASON 1/6.