The hidden history of Italian city life is uncovered.
Using cutting-edge technology and 3D scanners, the hidden treasures that lie beneath Naples, Venice and Florence are exposed and explored.
Dr Michael Scott and Alexander Armstrong discover hidden tunnels, historic passageways and even long-forgotten torture chambers.
By delving into the unseen architecture of these famous places, a lost history is unearthed.
Watch Italy's Invisible Cities and more acclaimed documentaries on BBC Select today. Restrictions apply*.
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