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TIL The proposed Helsinki-Tallinn Railway Tunnel, when completed, will be the largest underground tunnel in the world. It will help to reduce time to cross the current Gulf of Finland route from tw... (www.railway-technology.com)

submitted 1 year ago by PostBot@chat.maiion.com to c/todayilearned@chat.maiion.com

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[–] TenderfootGungi@lemmy.world 5 points 1 year ago

This is 100km. The Bering Straight separating Russia and Alaska is 83 km (52 mi).

There have been many proposals to build a bridge or tunnel to cross it. China recently (2014?) considered construction of a "China-Russia-Canada-America" railroad line that would include construction of a 200-kilometer-long (120 mi) underwater tunnel that would cross the Bering Strait. Source (from Wikipedia)