📜 Dual-gauge railway tunnel connecting Honshu and Hokkaido, Japan.
🔍 Features a 23.3 km undersea segment, reaching 240 meters below sea level.
🚄 Experience a ride through an engineering marvel
🗺️ Connects two major Japanese islands
🌊 World's longest undersea tunnel by total length
🚅 See Shinkansen and freight trains in action
💸 More expensive and slower than flying for long distances
🐢 Bullet trains operate at reduced speeds inside
🚉 Access via Aomori City (Honshu) or Hakodate (Hokkaido) stations.
Last updated 1 day ago
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