So apparently they're building an underwater tunnel in Turkey to connect Europe and Asia, and the trip across would only be about four minutes. It 8 miles long and is 60 meters below water. Even though in it's close to a fault line it was described as the safest structure in Istanbul. They reinforced it with seismic bars to ensure safety in an earthquake. It seems like a really good idea since the road connecting Europe and Asia is so crowded it's better that they have a second way to cross. http://www.telegraph.co.uk/news/wor...nderwater-tunnel-linking-Europe-and-Asia.html
One thing you forgot to mention is that this is a railway. I was wondering how it would only take 4 minutes to cross 8 miles when you'd need a car going at a constant 120 miles per hour which isn't exactly the smartest idea. With trains however, that's no problem. This is kind of interesting.
I wonder if they'll be setting up precautions just in case something were to happen to the tunnel, like emergency pods or something. It does seem like a pretty cool idea. I think it'd be really cool to make tunnels connecting America to some of the other countries ... so I don't have to take those bloody planes. I'll check back later to see how things turn out for the underwater tunnel.