Which was the invention that propelled the construction of higher and higher buildings? Concrete? Iron? It's the elevator. From the Tower of Babel to the Kingdom Tower in Saudi Arabia, humankind has always searched to build bigger and higher. What are the scientific advance and technologies that have made it possible to 'touch' the sky.

How are gravity defying bridges designed? For centuries there have been countless and huge advances in the field of civil engineering, What are they? What is next? Thanks to the explanations of leading experts in physics, maths and other hard sciences, the viewer plunges into a world of inventions from the past to tomorrow.

For centuries there have been countless and huge advances in the field of civil engineering, What are they? What is next? Thanks to the explanations of leading experts in physics, maths and other hard sciences, the viewer plunges into a world of inventions from the past to tomorrow. In this film we look at the masters of rail.