Iranian castles, known as Qal'eh, are historical fortifications that showcase the architectural prowess of ancient Persia. These structures were built primarily for defense and often served as royal residences or military strongholds. Many castles feature thick walls, towers, and intricate designs, reflecting the cultural and artistic heritage of the region. Some of the most famous Iranian castles include the Bam Citadel, a UNESCO World Heritage site, and the Karim Khan Citadel in Shiraz. These castles not only provide insight into the military strategies of the past but also highlight the rich history and diverse influences that shaped Iran over centuries.