The islet of Marathonisi in Laganas Bay, known as “Turtle Island,” is included in the Marine Park of Zakynthos, and it’s known for its characteristic shape and because it is a vital breeding ground for sea turtles, is one of the lesser-known of the many attractions of the Ionian Sea.
The islet, near the larger island of Zakynthos, is located just off Keri Beach, in Laganas Bay.
Marathonisi also includes two even tinier islets, which are together called Pontikonisia.
There are two main beaches on the islet of Marathonisi, one with pebbles, while the other has fine white sand.
This latter beach is included in Zakynthos Marine Park because endangered sea turtles use just this stretch of sand every year to dig a total of 1,300 different nests in which to lay their eggs.