Montségur is a historic castle located in the French region of Occitanie. It sits atop a steep hill in the Ariège department and is known for its role during the Cathar Crusade in the 13th century. The castle was the last stronghold of the Cathars, a religious group that faced persecution from the Catholic Church. The site is famous for the dramatic siege that took place in 1244, when the castle fell to French forces. Today, Montségur is a popular tourist destination, attracting visitors interested in its rich history and stunning views of the surrounding landscape.