The Clécy Viaduct, or La Lande Viaduct, is a railway bridge built in the second half of the 19th century by the Compagnie des Chemins de Fer de l'Ouest (Western Railway Company) created in 1855 by the merger of several railway companies serving Normandy and Brittany. Its construction, completed in 1866, allows the crossing of the Orne at the level of the La Lande hamlet in Clécy in the Calvados department. The viaduct is located between the stations of La Lande Clécy and Clécy-Bourg on the line of the Norman Switzerland railway that connects Caen to Flers.