2-640-720 - © CM Dixon/Heritage Images

High Bridge over River Witham, Lincoln, 20th century. The oldest bridge in the United Kingdom which still has buildings on it, built about 1160 A.D. The row of timber framed shops on the west side of the bridge date from about 1550. Bridges like this were common in the Middle Ages, the best known being London Bridge, but most have long since been demolished because of their obstruction to the river flow and to shipping.