Near the west coast of the island stand the ruins of a Crusader castle that has an older history beneath it. The Phoenicians fortified this spot, and the structure was repeatedly rebuilt by successive rulers — Hellenistic, Roman, Byzantine, and finally Crusader. Locals traditionally attribute its founding to Alexander the Great, though there is no good evidence for this; the visible remains are mostly medieval.
You can wander freely among the ruins, which are not fenced off or managed in any formal way. The setting is striking — old stone walls against the Mediterranean, with views back to the Syrian coast and the town of Tartus. There is no entry fee and no interpretation, which suits the atmosphere well.