Welland Viaduct, Harringworth Viaduct or Seaton Viaduct, crosses the valley of the River Welland between Harringworth in Northamptonshire and Seaton in Rutland, England. The viaduct is 1,275 yards long and has 82 arches, each with a 40 feet span. It is the longest masonry viaduct across a valley in the United Kingdom
