Civil engineers are still spanning gorges and rivers with bridges and reaching new heights with towers and skyscrapers. These essential structures allow us to access towns and cities easily, and to communicate across the globe using radio transmissions from tall structures. Engineers build bridges over rivers, lakes, canyons, highways and railways so we do not have to cross them with boats or travel around them. Towers are built to gain height for radio antennas, lookouts, lighthouses, wind turbines and for many other reasons. They have become an integral part of the society in which we live today. Read about famous towers and bridges, construction challenges, design techniques, specialist bridges and towers, and how engineers profit from mistakes.