World’s Biggest Mega Dams and Channels

The need of new territory has pushed water engineers to design new technology to create or preserve land. On the one side, cutting-edge technology has been design to dry marshes or to protect cities from flood, like Venice. But water is also behind or the object of other great technical challenges: how do we use it to create enough energy? How do we build canals and locks to make transportation more convenient, faster and safer?

Courtesy of Free Documentary