Between the villages of Tigaki and Marmari on the northern coast of the island lies the protected area of the Aliki (Salt Lake). The area functioned as a salt production installation until 1989.
The lagoon is filled with fresh water from two torrents as well as with sea water through a duct. During the last years, the entrance of sea water during the summer months has resulted in the retention of water throughout the year. The area is protected under the Ramsar and Natura conventions and hosts a variety of flora and fauna, including migratory birds, such as pelicans and flamingos as well as aquatic animals such as water turtles and water snakes.