The Viaduc de Chillon is a viaduct in Switzerland located in Veytaux to the southeast of Montreux. Built by the Consortium des Viaducs de Chillon between 1966 and 1969, it takes its name from the Château de Chillon which lies downhill on the shores of Lac Léman. The viaduct comprises two structures 12 metres (39 ft) wide carrying the east and westbound lanes of the Swiss A9 autoroute.