A forgotten military fortification connected to a network of secret tunnels are mysteriously hidden within the Rock of Gibraltar; experts investigate and uncover a derelict war-torn complex constructed for a highly classified WWII spy operation. |
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Title: | Hidden Tunnels of Gibraltar | |
Air Date: | June 9, 2022 | |
Runtime: | 60 min | |
Genres: | Mystery History Travel | |
Alien : Contains spoilers. Click to show. oops!