Marathonisi islet, Zakynthos: Marathonisi is located in Laganas bay, across the beach of Keri
It is not a single island, but rather two small islets known as Pontikonisia
It has a mile-long perimeter and is accessible by boat from Keri beach and Laganas bay
There are boats that travel to the islet on a regular basis
You can also hire a caique or participate in organized daily tours
