Super Explorers takes you back in time to the medieval days when people lived in castles and knights roamed slaying dragons and rescuing beautiful maidens: Castles were fortifications made of stone built in the Middle Ages to control land and protect nobles from their enemies. Many castles were surrounded by large water-filled moats. Most castles have secret passages so the inhabitants could hide or escape if the castle was taken by enemies. Castles had towers and arrow slits from which the soldiers could see any attackers at long distances. Knights swore their loyalty to the king or noble of their choice. Knights needed armor, weapons and a well-trained war horse, which he depend to take care of him in battle.