The Tersane is one of a very small number of medieval shipyards anywhere in the world that survives in recognisable condition. Built in 1228, just two years after the Red Tower, it was designed by the same Seljuk sultan, Alaeddin Keykubad I, as part of a coordinated effort to turn Alanya into a naval base that could project power across the eastern Mediterranean.
The shipyard consists of five vaulted stone bays, each open to the sea at the front, where boats could be brought in for construction and repair. The vaults stand largely intact, a remarkable fact given that the structure has been exposed to sea air for eight centuries. In their prime, each bay could shelter a galley; the whole complex could accommodate and service a meaningful fleet.
The shipyard is set into the base of the cliff face directly below the castle walls, and can be reached by walking along the harbour from the Red Tower. Entry is through a gate in the sea-facing wall. There is little in the way of interpretation or display, but the bare stone construction speaks for itself. Come at low tide for the best view of the interior galleries from the water side.