Seikan Tunnel
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The Seikan Tunnel is a 53.85 km dual-gauge railway tunnel in Japan, with a 23.3 km portion under the seabed of the Tsugaru Strait, which separates Aomori Prefecture on the main Japanese island of Honshu from the northern island of Hokkaido. The... Wikipedia
Opened: March 13, 1988
Length: 33.4 miles
Coordinates: 41°18′57″N 140°20′06″E / 41.3157°N 140.3351°E
End: Hokkaido
Location: Beneath the Tsugaru Strait
No. of tracks: Double track rail tunnel