Fort de Joux

Fort de Joux is a historic fortress located in eastern France near the Swiss border. Built in the 9th century and expanded over centuries, it served as a strategic defensive outpost controlling important trade and travel routes. The fort is notable for its imposing structure, underground tunnels, and dungeons, and has functioned as a prison, housing notable inmates like the French revolutionary figure Louis XVI. Today, it is a popular tourist destination, offering insights into medieval military architecture and regional history, while also serving as a cultural site that preserves France’s heritage.