Underground Worlds Season 1 Episode 8 The Maginot Line 2019
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The secrets of the largest subterranean fortress along France's border with Germany, and a look at how a unique precious mineral was discovered in Derbyshire.
- Released: 2019-11-13
- Runtime: 45 minutes
- Genre: Documentary
- Stars:
- Director:
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1. Gibraltar 2019-09-25
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3. Switzerland 2019-10-09
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4. Kingdom of Salt 2019-10-16
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5. Bouzincourt 2019-10-23
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6. City of Naours 2019-10-30
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7. Jersey War Tunnels 2019-11-06
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8. The Maginot Line 2019-11-13
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9. Edinburgh Vaults 2019-11-20
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10. Dover War Rooms 2019-11-27
