"Megaprojects are the multi-billion dollar infrastructural undertakings that, when completed, play a major role in organizing our daily lives. They serve as vital conduits for the movement of our cars, trains, and water; they transport the gas later burned to create our electricity and heat; they allow for the shipping of goods from one side of the planet to the other. Many of the world’s most iconic megaprojects were built in the first half of the 20 century. But are we now entering a new golden age of megaprojects for a more populous, more sustainable world? Here is a sampling of five of the world’s most expensive and complex projects underway today." - Steven Perez from Bookmarklet