The 1.5-mile-long bridge near the town of Millau in southern France, consisting of eight spans, sits atop the world's tallest reinforced concrete piers ranging from 260 to 804 feet tall. The complicated formwork of the piers had to be capable of handling high-speed concreting with pressures up to 2100 psf while providing smooth surfaces and sharp corners.

Take a look at other significant projects over the past fifty years in which concrete and industry innovations played a major role.