The islet of Marathonisi is spotted across the beach of Keri, in Laganas Bay. It is not a single island; it also includes two more islets called Pontikonisia. Its perimeter is just about a mile and can be reached by boat from Keri and Laganas. Boat itineraries to the islet are frequent. Otherwise, you can hire a caique or take part in organized daily tours.
In any case, visitors must be very careful during their trip to Marathonisi as it is a breeding place for the sea turtle Caretta Caretta, an endangered species of sea turtle that goes to Marathonisi to reproduce in the summer season. This is why visitors are not allowed to explore the island but are expected to stay only in the first 5 meters of a small beach so that they do not harm the eggs of the sea turtles. Moreover, another species in danger of extinction, the Monachus Monachus seal goes there to rest and reproduce.
Marathonisi is not inhabited and keeps its characteristic pine, olive and green oak forests in excellent condition. It has thick vegetation everywhere and two main beaches with different features. One of them has white sand, while the other has pebbles. The sandy beach is where the sea turtle goes to lay its eggs and that is why Marathonisi is included as part of Zakynthos Marine Park. There are also two interesting sea caves, where you can swim to go or use a boat. These caves are ideal for those who like snorkeling. The islet of Marathonisi is totally unspoiled. Therefore, it is advisable to take enough supplies with you.
Take unique photos of turtles at a close distance as you sail through the crystal clear waters off the coast of Zakynthos on a glass-bottomed boat. Explore the amazing Keri caves and cross the famous Arches from underneath.
This short cruise allows you to see the lovely island of Marathonisi and the caves of Keri. Along our way in the sea and in the island of Marathonisi, we will see the famous Caretta Caretta sea turtles.