The Castle of Bouillon is a historic fortress located in the town of Bouillon, Belgium. Built in the 10th century, it was strategically positioned on a rocky outcrop overlooking the Semois River. The castle played a significant role during the Crusades and was associated with Godfrey of Bouillon, a leader of the First Crusade. Today, the castle is a popular tourist attraction, offering visitors stunning views of the surrounding landscape. It features well-preserved walls, towers, and a museum that showcases the history of the castle and its importance in medieval times.