The Fort du Scex is a component of Fortress Saint-Maurice, which is in turn one of the three principal fortified regions of the National Redoubt of Switzerland. The Fort du Scex was built in the Scex cliff face immediately to the west of Saint-Maurice beginning in 1911. With the later Fort de Cindey, it comprises a fortress complex encased in rock high above the strategic Saint-Maurice valley. The fort lost its combat function in 1984 and was entirely deactivated in 1995. It is now open for public tours during the summer months.