It is situated near Schmitten, in the Canton of Graubünden, Switzerland.
The viaduct was opened in 1903 by the Rhaetian Railway, which still owns and uses it today.
The Schmittentobel Viaduct forms part of the Albula Railway section between Tiefencastel and Filisur.
Within sight of the Schmittentobel Viaduct, a little further along the line towards Filisur, is the much better known Landwasser Viaduct, which is one of the signature structures of the Albula Railway, and indeed the whole Rhaetian Railway.
Media related to Schmittentobel Viaduct at Wikimedia Commons