The Landwasser viaduct is a six-arch stone bridge that spans the Landwasser River in the Swiss Alps. It is located in the Canton of Graubünden, Switzerland and is part of the Rhaetian Railway network. The viaduct is considered one of the most impressive pieces of engineering on the Rhaetian Railway and is one of its most recognizable landmarks. It is about 135 meters long and towers about 65 meters above the river, providing stunning views of the surrounding mountains and valleys. The viaduct was completed in 1902 and has been an important part of Swiss transportation and tourism ever since.