The Top 9 Longest Tunnels in the World
A bit cliche `Top x ` article but still interesting: From the Interesting Engineering magazine: The Top 9 Longest Tunnels in the World https://interestingengineering.com/the-top-9-longest-tunnels-in-the-world imag: Svein Magne Tunli -WCCTags: longest tunnels in the world
cover tunnel photo by: Matt Brown from London, England / CC BY
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