York City Walls, often referred to as the Bar Walls, are England's finest example of medieval city fortifications. They are the longest town walls in England with a circumference of 3.4 kilometers and are remarkably complete, having been well-maintained over the centuries. These ancient walls were originally built in Roman times, with subsequent additions and renovations during the medieval period when York held significant strategic importance. Visitors can walk along significant portions of the walls, enjoying elevated views of the city, including its historic landmarks, such as York Minster and the winding medieval streets. The most notable parts include the gatehouses or 'bars', which served as fortifications and toll houses: Bootham Bar, Monk Bar, Walmgate Bar, and Micklegate Bar. Climbing onto the walls is via steps at various access points; manageable walks between each 'bar' offer a pleasant and informational experience with information panels recounting the walls' rich history.