Norway has ambitious plans to install the world’s first floating underwater tunnels to help travelers easily cross the nation’s many fjords. At present, the only way to travel across the bodies of water involves taking a series of ferries – an inconvenient and time-consuming process. The “submerged floating bridges” would consist of large tubes suspended under 100 feet of water, and each one will be wide enough for two lanes of traffic. The west side of Norway is made up of 1,190 fjords, which, while beautiful, make it very hard to travel along the country's coastline. Currently, the drive from the southern city of Kristiansand to Trondheim in the north takes an excruciating 21 hours and requires seven ferry crossings. To make that drive easier, the Norwegian Public Roads Administration (NPRA) has proposed the world's first underwater floating tunnel, which would be submerged in the Norwegian Sea. It is predicted to cost $25 billion (around £19 million) to build.

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