The Derry Walls are a series of historic fortifications surrounding the city of Derry, also known as Londonderry, in Northern Ireland. Built in the early 17th century, these walls were designed to protect the city from potential attacks. They are among the best-preserved city walls in Europe, stretching approximately 1.5 miles and featuring several gates and towers. Visitors can walk along the top of the walls, which offer stunning views of the city and the surrounding landscape. The Derry Walls are not only a significant historical site but also a popular tourist attraction, reflecting the rich history and culture of the area.