The World's subaqueous road tunnels,
rock, shield and immersed tubes.
Norwegian
fjord crossings. All the World's
longest, widest and deepest road tunnel projects ...
The longest and deepest strait crossings
in the World and the World's longest, deepest and highest
railway tunnels, Seikan, Eurotunnel, Shimitsu, Simplon,
Vereina ...
Rack-Railways
...