Alanya Archaeological Museum gives depth to a town often visited mainly for beaches and the castle. Its collections include local finds from prehistoric, classical, Roman, Byzantine, and Seljuk contexts, linking the port to the wider history of the Mediterranean coast.
It is a compact museum and works well before climbing to the castle or exploring the old harbor. The best reason to visit is context: objects from the region make the fortress and coastline feel less like scenery and more like a long-inhabited frontier.