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.

Aldimedia wikipedia → Gotthard Base Tunnel

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Answers by country

Italy

90%

Switzerland

81%

188

Australia

12%

73%

Estonia

27%

72%

the Netherlands

21%

67%

Thailand

14%

64%

Lithuania

27%

63%

Austria

13%

28%

53%

Germany

20%

10%

15%

52%

490

Greece

25%

21%

50%

France

17%

10%

24%

48%

Republic of Ireland

27%

22%

47%

Poland

20%

14%

19%

45%

7480

the United States

18%

17%

16%

45%

354

Spain

25%

12%

18%

43%

Israel

35%

11%

41%

the United Kingdom

20%

18%

22%

37%

222

Egypt

33%

26%

33%

Canada

20%

17%

35%

26%

India

22%

29%

20%

24%

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