A rail tunnel between Africa and Europe. Neato.
This is coming at a time when African countries are getting more and more serious about developing export industries, so this rail link to Europe could have a profound effect on development.
With all the talk about China's race for Africa, one wonders if we'll see a push from Beijing for a solid rail line from Africa (Egypt, I guess) to Central Asia. Time for me to go look at a map of old Soviet rail lines.
Now all we need to do is bridge the Korean strait, and the entire eastern hemisphere will be linked with lines of steel. Then there's the small matter of the Bering Strait....