There is just something about megaprojects that fascinate many people. From industry veterans, to civil engineers, to the common population, and you can put us on that list. From the sheer complexity of these projects, to the mark on human achievement, to accomplishing something that has never been done before. Usually helping to usher in a new era of building, and overall improvement of life.
Here is an awesome infographic from Futurism with a list of some of the most enormous construction projects that tip the scales on many levels from size, to complexity and cost.