Откриха най-дългия и най-дълбокия тунел в света Готард Швейцария The Gotthard Base Tunnel (GBT) is a railway tunnel in the heart of the Swiss Alps expected to open in 2016. With a route length of 57 km (35.4 mi) and a total of .rnrnThe ten longest railway tunnels in the world, inspired by Switzerlan