Kefalonia is home to the endangered caretta-caretta sea turtles! These sea turtles are slowly dying out, so its very important to be respectful of nature while traveling in Greece. Don't throw litter by the sea, or anywhere on the island. There are many beach areas that are protected during the mating period so make sure you follow the signs on the beaches as well. They lay eggs in the sand and stepping on the sand/eggs can be detrimental to the species.