In the caves and least accessible islets around Alonissos there are still a few rare monk seals that is the reason why the water around this serene green island has been declared a marine park. Old Alonissos is a very tranquil picturesque place with lovely views, the ideal place for a relaxing holiday. Most of the beaches are on the east coast, sheltered from the strong summer wind (Meltemi). Kokkinokastro beach was once the site of the ancient city Ikos; there are remains of the city walls and a necropolis under the sea. The wild territory makes it a popular destination with hikers as much as the Clearwater and seabeds are a true divers paradise. Patitiri, the main town and port of the island, has absorbed most of the old Alonissos that was abandoned after 1965 earthquake.