Tunnel Farm: one of the few cases of underground 'indoor vertical farming' in the world
It is one of the very few cases in the world of underground crops and the fir...ita di Siena. https://www.hortidaily.com/article/9560561/tunne...the-few-cases-of-underground-indoor-vertical-farming-in-the-world/World's Longest and Deepest Subsea Tunnel Ryfylke Tunnel Opens for Traffic
https://www.youtube.com/watch?v=NWfVcikta2E Ryfylke Tunnel, a part of the Ryfast chain of tunnels officially opened for traffic. Ryf...rd. On the day of opening for traffic on 30 December 2019, Ryfylke Tunnel is the World&...World’s longest water tunnel project completed in Saudi Arabia
Saline Water Conversion Corporation (SWCC) of Saudi Arabia completed the longest water pipeline tunnel project in the world, w...ay.co/saudi-arabia/5043720/SWCC-completes-world%E2%80%99s-longest-water-pipeline-tunnel...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 https://www.dailymail.co.uk/news/article-9497955/Mount-Victoria-Tunnel-NSW-Blue-Mountains-worlds-longest-ruled-cost.html
cover tunnel photo by: Matt Brown from London, England / CC BY
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