1908, the viaduct was opened in conjunction with the opening of the Tirano–Poschiavo section of the Bernina Railway. In 1943, the whole of the Bernina Railway was taken over by the Rhaetian Railway; this company continues to both own and operate services across the spiral viaduct to the present day. The services the spiral viaduct carries facilitate not only local trade purposes but tourism as well. Since 2008, the spiral viaduct, along with the rest of the route, has been recognised as a UNESCO World Heritage Site. See also Arch bridge Spiral (railway) Bernina Express Rhaetian Railway References Citations Bibliography Belloncle, Patrick. Le chemin de fer Rhétique, 1889-1999. Les Editions du Cabri, Switzerland, , . Carter, Graeme., Colin Garratt, David Jackson, Howard Johnston, William D. Middleton and Karl Zimmermann. Trains: The World's Greatest Trains, Tracks and Travels. Fog City Press, 2003. . Shales, Melissa. On the Rails Around the Alps. Passport Books, 1996. . Widmer, Markus. Eisenbahnbrücken. Transpress, Stuttgart (Germany), , . Wolmar, Christian. A Short History of Trains. Dorling Kindersley Ltd, 2019. External links Webcam overlooking Brusio spiral viaduct Video (9:56 min, 2020) of several trains traversing the Brusio spiral viaduct Viaducts in Switzerland Rhaetian Railway bridges Monuments and memorials in Switzerland World Heritage Sites in Switzerland Buildings and structures in Graubünden Bridges completed in 1908 1908 establishments in Switzerland 20th-century architecture in Switzerland