Begin your tour at Agios Sostis Harbour, right next to Cameo Island. Board the boat with a small group and head straight to the national marine park to spot Caretta-Caretta turtles.

Next, head towards the scenic Keri Caves to take photos of the amazing arches over the blue waters. Then, go to Marathonisi, also known as Turtle Island, known for its nesting beaches and turtle-like shape.

Enjoy a leisurely swim which lasts anywhere from 30 minutes to a few hours depending on your preference, since you can come back at any preferred time with one of the taxi boats which come and go every half hour and are included in the price of the tour.