English: Knaresborough is a historic market and spa town in North Yorkshire, England, four miles east of Harrogate. This elegant stone viaduct over the River Nidd was completed in 1851 and built through the picturesque town to carry a branch of the Leeds & Thirsk Railway. The four-span bridge stands 78ft high above the water, each span measuring 56ft 9in across. The viaduct was designed to blend with the architecture and character of the town, and its engineer (Thomas Grainger, who also worked on the Arthington Viaduct certainly achieved that goal.