Fort de Châtillon is a historic military fortification located in the Hautes-Alpes region of France. Built in the 19th century, it was part of a defensive system designed to protect the region from potential invasions. The fort is situated on a strategic hilltop, offering a commanding view of the surrounding landscape. The fort features thick stone walls and various military structures, including barracks and artillery positions. Today, Fort de Châtillon is a popular site for visitors interested in military history and architecture, providing insights into the engineering techniques of its time and the historical context of the region.