Ouvrage Granon is a lesser work (petit ouvrage) of the Maginot Line's Alpine extension, the Alpine Line. The ouvrage consists of one entry block, one infantry block and one observation block. Gondran was commenced in June 1933, and was intended to cover the gap between Janus and Les Aittes. The site is close to two older forts, designated Gondran C and Gondran D. The Maginot fortification became known as Gondran E. The fortified area is near the Les Gondrans portion of the Montgenèvre ski area.