Kastro (The Castle) is the medieval part of the main town which was built on the edge of the cliff, 200 meters above sea level, in order to protect the inhabitants from pirate raids. The north side of the cliff offers a magnificent view of the Aegean. The houses have two floors and are built side by side with the external, thick walls to create the wall of the castle. Entry is possible from 2 doors, the Loggia, which is the central door, and Paraporti. Inside you walk among the houses with stone steps, colorful, wooden balconies and pots with colorful flowers.