The islet of Marathonisi is located in the south of the Zakynthos island, overlooking the bay of Laganas across from lake of Keri. It is in the Natura 2000 protection program. Is an exotic, green turtle-shaped island, as if he knew it would host the nests of sea turtle caretta-caretta. In the long gold sandy beach that unfolds like a tongue in the sea, the turtles Caretta-Caretta make their nests. The Guards of the National Marine Park, stay there on a permanent basisin order to protect the island, the turtles and their eggs. Nature is truly unique and there are tropical beaches and unique caves on the island. At the turtle beach is the little church of Theotokos Odigitria, Marathonessiotissa. You can come to Marathonisi either with one of the organized daily tours, or rent your own boat to Marathonisi from the nearby beaches of Laganas, Lithakia and Keri Lake.