It's the longest as well as deepest railway tunnels so far and took around 16 years to be built. Find out the science behind one of the most extremely engineered megastructures in World History - The Gotthard Base Tunnel:https://www.encardio.com/metro-tunnels/
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The Gotthard Base Tunnel Switzerland

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It's the longest as well as deepest railway tunnels so far and took around 16 years to be built. Find out the science behind one of the most extremely engineered megastructures in World History - The Gotthard Base Tunnel:https://www.encardio.com/metro-tunnels/

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