Underground Worlds
Ireland's Underground Alcatraz
Season 2 Episode 6 of 10
Exploring hidden defences that have kept Cork Harbour, in Ireland, safe for over 400 years. Plus, a former submarine base in the fjords of northern Norway
Underground Worlds airs on U&Yesterday at 7:10 AM, Wednesday 18 September. (Subtitles, audio description.)
Topics
News ➝ Current Affairs
Documentary