Tersane (Seljuk Shipyard)

If the castle and the Red Tower were about defending Alanya, the Tersane is about what all that defence was actually for: building and sheltering a fleet. Constructed in 1227, the final piece of Sultan Alaeddin Keykubad I's roughly decade-long building campaign here, the shipyard is the only surviving medieval Seljuk shipyard known anywhere in Türkiye - which makes it a genuinely rare structure, not just a locally significant one. Its design is straightforward and purposeful: five vaulted, arched docks, each a separate bay, opening directly onto the sea so ships under construction or repair could be worked on with direct water access and hauled out from the elements under stone cover. Walking into the bays at water level puts you inside working medieval industrial space in a way the castle and tower, built for defence and display as much as function, don't quite offer - this was a yard where actual ships got built, and the architecture reflects that plain, repeated, load-bearing logic rather than any ornamental ambition. The symbolism mattered as much as the practicality at the time: a Seljuk state built on the Anatolian plateau, without a deep maritime tradition of its own, committing to a purpose-built naval shipyard on the Mediterranean was a genuine declaration of intent, not an afterthought - Keykubad was building the infrastructure of a Mediterranean sea power in a single concentrated decade, castle, tower, and shipyard as one coordinated project. A small watchtower called the Tophane sits on a rock outcrop directly above the yard, built the same year specifically to guard it from seaward attack, and the sightline down from that tower onto the docks below is worth the short detour if you want to see the whole defensive logic of the complex in one glance. The Tersane usually draws far fewer visitors than the castle or the tower, which makes it one of the easier stops here to actually take your time in.