AirDate: 10/9/2019 |
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Overview: A look at some of Switzerland's 300,000 subterranean bunkers, the creation of a local entrepreneur shrouded in mystery in England and a network of tunnels deep beneath Slovenia. |
SwitzerlandShow: Underground Worlds --> Season: 1 - Season 1
AirDate: 10/9/2019
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|
Overview: A look at some of Switzerland's 300,000 subterranean bunkers, the creation of a local entrepreneur shrouded in mystery in England and a network of tunnels deep beneath Slovenia. |