Are there any underwater roads?

World's longest underwater rail and road tunnel will connect Germany and Denmark by 2029. The Fehmarnbelt tunnel could slash travel times between Central Europe and Scandinavia. Denmark and Germany will soon be linked by an 18-kilometre-long underwater tunnel.



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Despite this, it's not as easy as this. The Channel Tunnel, in fact, has the longest underwater section, with 39 km against the 23 km of its Japanese rival. Nevertheless, the title of the world's longest still goes to the Seikan tunnel.

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Detroit-Windsor Tunnel It is the third oldest underwater vehicle tunnel in the United States or Canada. It stands behind only New York/New Jersey's Hudson River-crossing Holland Tunnel (completed in 1927) and the Posey Tube (completed in 1928), which connects Alameda and Oakland, California.

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The Channel Tunnel (often called the 'Chunnel' for short) is an undersea tunnel linking southern England and northern France. It is operated by the company Getlink, who also run a railway shuttle (Le Shuttle) between Folkestone and Calais, carrying passengers in cars, vans and other vehicles.

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The Channel Tunnel (French: Tunnel sous la Manche), also known as the Chunnel, is a 50.46-kilometre (31.35 mi) underwater railway tunnel that connects Folkestone (Kent, England) with Coquelles (Pas-de-Calais, France) beneath the English Channel at the Strait of Dover.

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Today, trains continue to go through the railway tunnel several times an hour, making it difficult to see the original tunnel, but the Brunel Museum tells the story of the creation of the Thames Tunnel, on the site of the Engine House and the original tunnel shaft sunk into the ground.

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The Channel Tunnel (French: Tunnel sous la Manche), also known as the Chunnel, is a 50.46-kilometre (31.35 mi) underwater railway tunnel that connects Folkestone (Kent, England) with Coquelles (Pas-de-Calais, France) beneath the English Channel at the Strait of Dover.

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Thames Tunnel, also called Wapping-Rotherhithe Tunnel, tunnel designed by Marc Isambard Brunel and built under the River Thames in London.

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