The Millau Viaduct (Viaduc de Millau) stands as one of the most remarkable achievements in modern civil engineering, crossing the Tarn Valley near Millau in southern France. This cable-stayed bridge represents a seminal infrastructure project on the A75 motorway, ultimately connecting Clermont-Ferrand to Montpellier and forming part of the crucial Paris-Barcelona route. The structure began construction in October 2001 and was completed in January 2005, with the bridge opening to traffic on December 16, 2004.