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Underwater tunnel

technology Maturity 11-13

Some paths go under the sea.

Helsinki-tallinna.JPG
Helsinki-tallinna.JPG
They can be for cars. They can be for trains too. These paths help us travel fast. They stay safe in bad weather. Would you like to ride in one?

37 words
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File:Helsinki-tallinna.JPG
Helsinki-tallinna.JPG
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📚 Content adapted from Wikipedia | Readability: FK 10.6 | Vital Level 5