'Biggest' Stonehenge site discovered
7 September 2015 Last updated at 16:44 BST
Archaeologists have found around 100 huge standing stones buried near Stonehenge.
Experts think the discovery could be the 'biggest' prehistoric monument ever built in Britain.
The stones were uncovered using special equipment that scans below the Earth's surface.
Researchers said finding the stones was "fantastically lucky".
Watch Jenny's report to find out more.