What is the longest and deepest tunnel in the world?
Eurotunnel (English Channel)
Lötschberg (Switzerland - Germany)
Seikan (Hokkaido-Honshu Island)
Tunnel da basa dal Son Gottard) is a railway tunnel through the Alps in Switzerland. With a route length of 57.09 km (35.5 mi),it is the world's longest and deepest traffic tunnel and the first flat, low-level route through the Alps.
reach: rather globalbuildingsgeographySwitzerland
+4 Very interesting! globalquiz.org
+1 Very interesting! Ninjai