Zorro engineer and Crew Haringvliet for First time walk pass through underwater tunnel in Rotterdam Which was built in 1937 till 1942.
The length of the Maastunnel is 1373 metres (including access roads). The underground part is 1070 metres long. The lowest point of the tunnel is approximately 20 meters below sealevel.
Негізгі бет World's first rectangular shaped underwater tunnel
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