2 Season
20 Episode
Underground Marvels - Season 1 Episode 1 Secrets of the Rock
A hidden, subterranean city built within the Rock of Gibraltar was an immense fortress to control the seas during World War II, and new discoveries reveal the secrets of a long-lost chamber with evidence of high-stakes espionage.
- Year : 2021
- Country : United Kingdom, United States of America
- Genre : Documentary
- Studio : Science, U&Yesterday
- Keyword :
- Director :
- Cast :
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