Ereğli Castle is a historical fortress located in the town of Ereğli, in the Zonguldak Province of Turkey. Built during the Byzantine Empire, it served as a strategic defense point due to its elevated position overlooking the surrounding area. The castle features thick stone walls and several towers, showcasing the architectural style of its time. Over the centuries, Ereğli Castle has undergone various renovations and restorations. It has witnessed numerous historical events and changes in control, including periods under Roman, Byzantine, and Ottoman rule. Today, it stands as a popular tourist attraction, offering visitors a glimpse into the region's rich history.