The Gotthard Base Tunnel(section pictured), the longest and deepest mainline railway tunnel in the world, opens in the Swiss Alps. - Post by InTheNews on Boldomatic

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The Gotthard Base Tunnel(section pictured), the longest and deepest mainline railway tunnel in the world, opens in the Swiss Alps.

The Gotthard Base Tunnel(section pictured), the longest and deepest mainline railway tunnel in the world, opens in the Swiss Alps.

en.wikipedia.org

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reposted by Babs_77