Switzerland’s Gotthard Base Tunnel runs 57 km straight through the Alps — deeper underground than the Eiffel Tower is tall.
How to Play: Guess if the tunnel on the right is LONGER or SHORTER than the one on the left.
Name A
Name B
Top 10 Longest Tunnels
Tunnel length includes total bore. Combined road and rail tunnels are listed; some serve only one purpose.
| # | Name | Length (km) | Unit |
|---|---|---|---|
| 1 | Gotthard Base Tunnel | 57.10 | km |
| 2 | Brenner Base Tunnel (under construction) | 55 | km |
| 3 | Seikan Tunnel (Japan) | 53.90 | km |
| 4 | Channel Tunnel (UK-France) | 50.50 | km |
| 5 | Eurotunnel Cargo Section | 50.50 | km |
| 6 | English-French Channel Tunnel rail | 50.50 | km |
| 7 | Yulhyeon Tunnel (Korea) | 50.30 | km |
| 8 | Lötschberg Base Tunnel | 34.60 | km |
| 9 | Guangshen Express Rail | 34 | km |
| 10 | New Guanjiao Tunnel (China) | 32.70 | km |
Tunnel Engineering
The Gotthard Base Tunnel (2016) is the world’s longest and deepest railway tunnel — up to 2.3 km below the Alps. It cut north-south European travel time by 1 hour and routes 50%+ of trans-Alpine freight.
Channel Tunnel (1994) connects England and France under the Channel. 50.5 km total, with 38 km undersea — the longest underwater tunnel section in the world.
Norway’s Lærdal Tunnel (2000) at 24.5 km is the world’s longest road tunnel. Anti-fatigue lighting and three colored ‘caves’ break up the monotonous drive.
Frequently Asked Questions
World's longest tunnel?
Gotthard Base Tunnel in Switzerland at 57.1 km — railway.
Longest road tunnel?
Lærdal Tunnel in Norway at 24.5 km.
Is the Channel Tunnel really 50 km?
Yes, but only 38 km is undersea. Total tunnel length including approaches is 50.5 km.
Why are recent record tunnels so long?
Modern boring machines and base-tunnel design (going under mountains rather than over) enable longer tunnels.
Note: Tunnel length in km per public records and engineering databases.
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