Kastamonu Fortress is a historic castle located in the city of Kastamonu, Turkey. It was built during the Byzantine period and later expanded by the Seljuks and Ottomans. The fortress is situated on a hill, providing a strategic view of the surrounding area and the Kastamonu River. The fortress features impressive stone walls and several towers, showcasing the architectural styles of different eras. Visitors can explore the ruins and enjoy panoramic views of the city and its landscape. Today, Kastamonu Fortress is a popular tourist attraction, reflecting the rich history of the region.