Derry, officially known as Londonderry, is the last remaining completely walled city in all of Ireland. Intact since the 17th century to thwart incoming settlers from Scotland and England. Within the walls, visitors can see the town’s original layout with its well-preserved Renaissance style street plan along with St. Columb’s Cathedral, the city’s most historic building. After exploring the city’s history, visitors can appreciate modern architecture while crossing the nearby pedestrian Peace Bridge across the River Foyle, a visual treat, and a vital stop while in Londonderry.