What is the longest and deepest tunnel in the world?

Eurotunnel (English Channel)
Lötschberg (Switzerland - Germany)
Seikan (Hokkaido-Honshu Island)
Gotthard-Basistunnel (Switzerland-Italy)
Tunnel da basa dal Son Gottard) is a railway tunnel through the Alps in Switzerland. With a route length of 57.09 km (35.5 mi),it is the world's longest and deepest traffic tunnel and the first flat, low-level route through the Alps.
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Very interesting!
reach: rather globalbuildingsgeographySwitzerland

Answers by country

Eurotunnel (English Channel)
Lötschberg (Switzerland - Germany)
Seikan (Hokkaido-Honshu Island)
Gotthard-Basistunnel (Switzerland-Italy)
answers
flagItaly
6%
2%
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flagSwitzerland
5%
8%
2%
81%
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flagAustralia
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flagthe Netherlands
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flagAustria
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flagGermany
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flagFrance
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48%
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flagRepublic of Ireland
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22%
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flagthe United States
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16%
45%
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flagPoland
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flagNorway
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flagthe United Kingdom
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flagEgypt
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flagIndia
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