Yarm Viaduct towers above the town of Yarm. It was constructed in the mid-19th century and represents a remarkable feat of engineering, given that there were no mechanical excavators or mobile cranes available. Instead, the building materials had to be hauled into position through a combination of a pulley system and teams of horses. Nevertheless the structure was completed in just over four years and proudly boasts as many as forty-three arches, two of which carry the railway over the River Tees.
