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The World's would be longest tunnel: 50 km under Australia's Blue Mountains
Ambitious plans to build a 50km tunnel under the Blue Mountains would have made it almost the longest in the world - until bureaucrats ruled it out for being too expensive
cover tunnel photo by: Matt Brown from London, England / CC BY
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https://www.dailymail.co.uk/news/article-9497955/Mount-Victoria-Tunnel-NSW-Blue-Mountains-worlds-longest-ruled-cost.html
Tunnel under Blue Mountains would have been world's longest
www.dailymail.co.ukAt 50km long, the tunnel connecting Sydney and western New South Wales would have been the fifth longest in the world and bypassed the nearly 200-year-old and heavily congested Victoria Pass.