At the southernmost tip of Zakynthos, in the Bay of Laganas, lies the tiny little island of Marathonisi, also known as Turtle Island. For millions of years, the ancient caretta-caretta sea turtle has laid its eggs on this island. It’s worth stopping by Marathonisi just to have a look at these unique creatures. And don’t miss the chance to take a dip in the bay’s pristine waters . The island’s territory has been declared a conservation area so as not to disturb the turtles. Everything is immaculately clean here; you can visit, but you can’t even use umbrellas on the beach so as not to accidentally harm any turtle nests.