The York City Walls are a set of medieval walls that surround the city of York, England. They are one of the most well-preserved city walls in Europe and a popular tourist attraction. The York City Walls were built in the 12th and 13th centuries and are about 2.5 miles long. The walls are still standing in many places, and offer visitors a great way to explore the city. There are several gates in the walls, including Micklegate Bar, Monk Bar, and Bootham Bar.