Marine Park Extended
Zakynthos
The most complete south coast experience. Four hours, three swimming stops, and a route that covers the full sweep of the National Marine Park. Departs at 10:00 and 14:00 from Agios Sostis.
Tour Details
The Route
- 1. Turtle Spotting — Laganas Bay — Slow cruise through Laganas Bay turtle nesting zone. The 10:00 departure catches the morning calm with excellent surface sighting conditions.
- 2. Keri Caves — Second Arch · 1st Swimming Stop — Deeper into the Keri Cave system. Turquoise water, dramatic limestone overhangs. One of the best snorkelling spots on the south coast.
- 3. Mizithres Rocks · 2nd Swimming Stop — Full stop at the twin conical limestone sea stacks. Swimming at the base of the rocks with crystal-clear water.
- 4. Marathonisi — Turtle Island · 3rd Swimming Stop — Final stop at Marathonisi. Shallow, sheltered, clear water. Turtle sightings common on the return leg.
How Does This Compare?
| National Marine Park (3h) | Marine Park Extended (4h) | |
|---|---|---|
| Duration | 3 hours | 4 hours |
| Price | €25/person | €30/person |
| Swimming stops | 2 | 3 |
| Marathia thermal springs | Yes | No |
| Mizithres Rocks | No | Yes — full stop |
| Marathonisi | Yes | Yes |
Frequently Asked Questions
Will we definitely see turtles?
Common but not guaranteed — wild animals in their natural habitat. Morning departures offer the highest likelihood of sightings.
What's the difference from the 3-hour National Marine Park tour?
The Extended tour gives you an extra hour, adds a third swimming stop at Mizithres Rocks, and takes you deeper into the Keri Cave system. See the comparison table above for the full breakdown.
Meeting Point
Departures from Agios Sostis harbour, South Zakynthos.
From Kalamaki / Airport: ~5 min by car · From Laganas: ~10 min
From Zakynthos Town: ~15 min · From Tsilivi: ~20 min
Contact us when booking and we will arrange it. Transfer charged separately.
Our Office
You can also visit us at our office opposite Zakynthos Airport in Kalamaki and book in person any time. We're open daily during the tourist season and happy to help you plan your trip face to face.
Ready to Explore?
Tell us your preferred date and number of guests. We confirm availability and respond directly.
What guests say
Real stories from Zakynthos
Relaxing vibe with Ioneon travel, beautiful coast, splendid beaches - must do activity during Zakynthos vacation!
Such an amazing experience and breathtaking views, The captain was so nice and helpful. This is specific agency has made it much easier for us to book the trip quickly and Answered our questions quickly and provided us with all the information needed! Strongly recommended
Perfect experience - for our car and our boat and everything else, Pasquale made sure our vacation was perfect. Highly recommend.
Had a very good experience with Ross&Sara booking 2 boat trips which they recommended. It was amazing and very beautiful, a great experience overall.
Quick, informative and personal. Good service and a will to meet our expectations. 👌👌
Super helpful and the owner is from Kalamaki so knows everyone so also sorted taxis, restaurant recommendations and even the captain of our boat trip. Sunset cruise was the best!
Very nice organized trips. Lampro is very dedicated and he kmows where he is talking about. We had a great time! Thanks Lampro 😃
Wonderful experience! Definitely recommend to book your excursion with em🥰