The world's longest tunnel has just been completed at Sedrun in Switzerland.
(The Gotthard Base Tunnel (GBT) cost over 9 billion Swiss Francs. With a length of 57 km (35.4 miles) and a total of 151.84 km (94.3 miles) of tunnels, shafts and passages, it is the world's longest rail tunnel, surpassing the Seikan Tunnel in Japan. After 14 years of drilling, the tunnel is now all the way through.)