Top 10 longest tunnels in the world

The fact today is that the longest large tunnels in the world is constructed for water distribution, followed by tunnels for railways and metro. The top 10 of all of the tunnels are below with longest to come at the end, starting from number 10.

10- Tochomae - Shiodome - Hikarigaoka (Toei Oedo Line)

Location Tokyo, Japan
Length (feet) 40,700m
Type Metro
Year 2000 (started in 1991)
Details -NA-

9- Metro Madrid L-12: (Metro Sur)

Location Madrid, Spain
Length (feet) 40,900m
Type Metro
Year 2003 (started in 1993)
Details -NA-

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