Start from the departure point at the port in Agios Sostis or choose the option that includes hotel transfers from Kalamaki, Alikanas, Tsilivi or Zante Town. Board a fully transparent - glass-bottomed boat that lets you see beneath spotting more easily the "loggerhead" sea turtles - "Caretta Caretta"

Bring your own snorkeling gear to explore the underwater world at your own pace. See how the light plays on the arched walls of the Keri Caves and swim in this picturesque spot, accessible only by boat, before returning to the port in Agios Sostis.

Drift across the water to Marathonisi Island, also known as Turtle Island, as it is shaped like a turtle and has a nesting beach where Caretta Caretta (loggerhead) turtles nest. Stop for a refreshing swim or stay on board to admire the white sands and watch the turtles from the boat.