Inside the world's deepest tunnel that's 35 miles long and cost a staggering £9.6bn to build - World News

The Gotthard Base Tunnel in Switzerland is 2,300 metres deep, 57 kilometres long and cost a staggering £9.6bn to build - but it was closed after disaster struck in 2023 when a train derailed inside

Related Keywords

Milan ,Lombardia ,Italy ,Zurich ,Züsz ,Switzerland ,Swiss , ,Express ,Gotthard Base Tunnel ,Swiss Alps ,Ballast Nedham ,Seikan Tunnel ,Trains ,