In Who Built That? Bridges, Didier Cornille presents ten of the most important bridges in the world, from the first in cast iron to the longest in prestressed concrete in the southern hemisphere, to the tallest in the world. Introducing each engineer or architect, the main concepts of their work, and some of their most important projects in charming drawings and accessible text, Bridges is a fun primer for readers of all ages interested in learning more about these magnificent structures. His detailed drawings of bridges and their construction provide original insight into the development of the engineering and architectural concepts behind each span.