On the western side of Kastellorizo is the most ancient and important sight of the island – Palaiokastro. It is an ancient settlement with a lot of remains of buildings and water cisterns. On its Doric Acropolis of the 3rd century B.C. there is an inscription that mentions the name of Megisti. In the area, in the location of Limenari, there are remains of the Cyclopean Walls.