The Kastoria Fortress is a historic structure located in the city of Kastoria, Greece. It dates back to the Byzantine period and has undergone various modifications over the centuries. The fortress is known for its impressive walls and towers, which offer stunning views of the surrounding area, including Lake Kastoria. Inside the fortress, visitors can explore several churches and remnants of ancient buildings. The site reflects the rich history of the region, showcasing influences from the Byzantine Empire and later periods. Today, the fortress is a popular tourist attraction, drawing history enthusiasts and visitors alike.