The Citadelle de Namur is a grand historical fortress offering breathtaking panoramic views of the city and the Meuse Valley. The site is generally accessible, with a cable car providing an enjoyable ascent to the top, though some subterranean passages may have limited accessibility due to stairs. Visitors can explore solo, but guided tours, particularly for the fascinating underground tunnels, are highly recommended for historical insight and are usually offered through the Terra Nova Visitor Centre. While open year-round, specific attractions like the cable car or certain tours may have seasonal operating hours, typically from spring through autumn. Expect approximate costs to vary from €5-€20 per person, depending on whether you opt for the cable car, visitor centre, or guided tours, with combined tickets often available. A typical visit duration ranges from 2 to 4 hours, allowing ample time to explore the grounds, museums, and enjoy the scenery. Comfortable footwear is advised, and checking the official website for current opening hours, event schedules, and ticket options is always recommended.