Dağlı Castle, also known as Dağlı Kalesi, is a historical fortress located in the district of Erdemli in Mersin, Turkey. This castle carries great historical significance, providing a glimpse into the region's rich past and architectural heritage. Dating back to the Byzantine period, Dağlı Castle served as a strategic stronghold to protect the area and control trade routes. It played a crucial role in defending the region from invasions and safeguarding the local population. Over the centuries, the castle underwent various modifications and additions by different civilizations, including the Seljuks and the Crusaders.