The Old Quebec City Walls are a UNESCO World Heritage Site and a must-see attraction in Old Quebec City. These historic fortifications surround the old part of the city and offer a glimpse into its rich history. Visitors can walk along the walls and enjoy panoramic views of the city and the St. Lawrence River. The walls also provide access to several gates, such as Porte Saint-Louis and Porte Saint-Jean, which are worth exploring. A visit to the Old Quebec City Walls is a great way to immerse yourself in the charm and history of the city.