Ever since he has had a ditch or a river to cross man had been building bridges. In fact the oldest bridges go back to around 4000BC. And Roman engineers threw bridges across great rivers like the Danube and the Rhine as their armies marched across Europe. Today bridge building is at the very cutting edge of technology as engineers strive to use the lightest possible materials to build longer and longer spans across estuaries and island straits. Few engineers would have believed it possible to join Europe with Asia by bridging the Bosporus, with a span of over 3500 ft, and now we have the world record Akashi Straits Bridge in Japan with a span of over 6500ft. This highly praised documentary gives us a unique view of the world through the bridge builder's eyes.