Large stones at Durrington Walls
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Underground 'superhenge' discovered in Wiltshire

7 September 2015 Last updated at 06:45 BST

Archaeologists have discovered at least a hundred stone monoliths near Stonehenge, buried just a metre beneath the ground.

Some of the 4,000 year-old structures are almost 15 feet tall and were found using the latest technology, to create underground maps.

Victoria Gill reports.

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