Longest Underwater Tunnels In The World

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Seikan Tunnel is a 53.85 km dual-gauge railway tunnel in Japan, with a 23.3 km portion under the seabed of the Tsugaru Strait

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Channel Tunnel, also known as the Chunnel, is a 50.46 km undersea railway tunnel that connects the towns of Folkestone (England) and Coquelles (France) beneath the English Channel

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With an overall length of 23.7 km, the Tokyo Bay Aqua-Line includes a 4.4 km bridge and 9.6 km tunnel underneath the bay

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Ryfast Tunnel System, located in Norway, consists of two tunnels with a combined length 14.3 km beneath the sea

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Eysturoyartunnilin, known as the Eysturoy tunnel, spans 11.2 km beneath the North Atlantic Ocean

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Great Belt Bridge, also known as the Great Belt Fixed Link, consists of two bridges and a tunnel connecting the Danish islands of Zealand and Funen

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Eiksund Tunnel, located in Norway, stretches more than 7.68 km between the Norwegian mainland and Hareidlandet Island

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The Qingdao Jiaozhou Bay Tunnel is an under-sea road tunnel located in eastern China's Shandong Province

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