The Elizabethan town walls are Berwick's defining feature and among the finest surviving example of Italian-style artillery fortifications in Britain. Built between 1558 and 1569 to a design by Sir Richard Lee, they replaced medieval walls that could not withstand cannon fire. The new ramparts were lower and thicker, designed to absorb artillery bombardment, and flanked by angled bastions that gave defenders complete fields of fire.
You can walk the full circuit of the walls — about a mile and a half — in well under an hour, passing along the grassy ramparts with views over the estuary and the sea to the east and over the town's rooftops to the west. It is one of the most pleasant short walks in northern England. The walls are maintained by English Heritage, and admission to walk them is free.