The Whalley Viaduct is a historic railway bridge located in Whalley, Lancashire, England. It was completed in 1850 and spans the River Calder, connecting the towns of Whalley and Clitheroe. The viaduct is notable for its impressive architecture, featuring 14 arches and a total length of 400 meters. It was designed by the engineer John Aird and is a key part of the former Clitheroe Line. Today, the Whalley Viaduct is recognized as a significant landmark and is often admired for its aesthetic appeal. It is a popular spot for photography and offers scenic views of the surrounding countryside. The structure is also a reminder of the region's rich railway history and its role in the development of transportation in the 19th century.