Château Fort de Bouillon
Dominating the surrounding area from atop its rocky spur above the Semois River is one of Belgium's largest and oldest remaining castles. It was first documented in the 10th century, but it may be even older. In 1082, then-owner Godfrey of Bouillon sold the castle to the bishop of Liège in order to raise money to finance the First Crusade. Much of the building's current appearance is down to the French military engineer Vauban, who strengthened the walls in the 17th century on the orders of Louis XIV. You enter the main courtyard by first passing over three drawbridges. Once inside, climb to the top of the 16th-century Tour d’Autriche and you'll be rewarded with stunning views of the town and the Semois River. Kids will particularly enjoy a visit to the torture chamber and the dungeons.
