Schiers is a Swiss village in the Prättigau and a municipality in the political district Prättigau/Davos Region in the canton of Graubünden. The first concrete girder bridge ever built, Salginatobel Bridge, is located in Schiers. Designed by Robert Maillart and completed in 1930, in 1991 it was the first bridge to be designated an International Historic Civil Engineering Landmark by the American Society of Civil Engineers. Wikipedia