A PREVIOUSLY unknown underground tunnel has been discovered at Lincoln Castle.
Archaeologists uncovered the medieval structure during exploratory work at ground level prior to the installation of a lift that would take people on to the castle walls.
The tunnel, which is linked to a circular room or structure, was uncovered by Lincoln Cathedral archaeologist Dr Philip Dixon and is fast becoming the talk among archaeologists and history buffs.
County archaeologist Beryl Lott described it as an exciting and unique discovery.
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