Which is the largest tunnel in the world?

BRY2K

The qanat or kareez of Persia is a water management system used to provide a reliable supply of water to human settlements or for irrigation in hot, arid and semi-arid climates. It is a tunnel. The oldest and largest known qanat is in the Iranian city of Gonabad which after 2700 years still provides drinking and agricultural water to nearly 40,000 people. Its main well depth is more than 360 meters and its length is 45 kilometers. http://en.wikipedia.org/wiki/Tunnel The world's largest wind tunnel is 80-by-120-Foot. http://www.sciencedaily.com/releases/2000/04/000406090140.htm Also, deep beneath the Alps, the Swiss are building a high-speed rail link between Zurich and Milan. It will include, at 57 kilometres (35 miles), and is considered the world's LONGEST tunnel. In case you were curious. http://news.bbc.co.uk/2/hi/europe/6471241.stm Mar 12 08, 4:39 AM

adam86107

The longest road tunnel is in Norway. http://www.bergen-guide.com/538.htm Mar 12 08, 6:34 AM

whee	The Päijänne Water Tunnel is the world's longest continuous rock tunnel. It is 120 kilometers (74.6 miles) long and runs 30-100 meters under bedrock. http://en.wikipedia.org/wiki/P%C3%A4ij%C3%A4nne_Water_Tunnel Mar 12 08, 8:34 AM