Kardzhali Fortress is a historical site located near the town of Kardzhali in Bulgaria. It dates back to the Middle Ages and served as a strategic military stronghold. The fortress is situated on a hill, providing a commanding view of the surrounding landscape and the Arda River. The ruins of the fortress include remnants of walls, towers, and gates, showcasing the architectural style of the period. Today, Kardzhali Fortress is a popular tourist attraction, offering visitors a glimpse into the region's rich history and the opportunity to explore its scenic surroundings.