Geography · World Extremes
Which is the world's longest undersea rail tunnel?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1Channel Tunnel (UK-France)
- 2Seikan Tunnel (Japan)✓
- 3Gotthard Base Tunnel (Switzerland)
- 4Laerdal Tunnel (Norway)
Correct answer
Seikan Tunnel (Japan)
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