If you like this, you should get yourself a copy of "Engineer's Dreams" by Ley. It is fairly old and full of such grand projects. One of them, the Channel Tunnel, is no longer a dream.
It's fiction, but still a fun read: Harry Harrison's A Transatlantic Tunnel, Hurrah!
In Which Our Hero, A Descendent of the Traitorous George Washington, Builds a Railway Under The Sea, Wherein Passengers Travel To The Court of Her Britannic Majesty In Atomic Powered Comfort.
I also enjoyed "Project Orion: The True Story of the Atomic Spaceship" by Dyson. It's about another grand engineering project at the edge of possibility: Building spaceships powered by nuclear bombs that theoretically could lift whole cities to the stars and accelerate to 3% of the speed of light.
