The world’s biggest tunnel-boring machine has dug the 9km-long Gudauri tunnel in the mountains of the Caucasus state of Georgia. It’s part of the 23km “KK Highway” linking the cities…
The world’s biggest tunnel-boring machine has dug the 9km-long Gudauri tunnel in the mountains of the Caucasus state of Georgia. It’s part of the 23km “KK Highway” linking the cities…