Stone walls coil around York for 3.5km (2 miles) and are the longest medieval town walls in England that are still intact. The stretch from Monkbar to Petergate is particularly picturesque and walking the whole length will take about two hours. There are interpretive panels at 16 key points along the route, five historic gateways and 45 towers. The highest and most impressively crafted of the gateways is called Monk Bar and dates back to the 14th century. A self-contained fortress with an arch, it also contains the new Richard III Experience, dedicated to the House of York’s infamous last king. Meanwhile, Micklegate Bar continues the story with the Henry VII Experience.