Agios Sostis: Marathonissi, Keri Caves, and Turtle Spotting

Agios Sostis offers an incredible opportunity to explore the natural wonders of Zakynthos. Visitors can embark on a glass-bottom boat tour that takes them to Marathonissi Island, the Keri Caves, and the renowned breeding ground for loggerhead turtles. With stunning views of the National Marine Park, this adventure combines relaxation and excitement, making it a must-do for nature enthusiasts and thrill-seekers alike. But the real question is – what hidden gems await those who choose to discover this captivating destination?

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Key Points

Take a 3-hour glass-bottom boat tour from Agios Sostis harbor in Laganas to explore Keri Caves, Marathonissi Island, and spot loggerhead turtles.
Swim in the breathtaking Keri Caves, accessible only by boat, and visit the renowned loggerhead turtle breeding ground on Marathonissi Island.
Enjoy scenic views of the National Marine Park of Zakynthos and capture stunning photos during the tour.
Snacks, drinks, and ice cream are available for purchase on Marathonissi Island.
Recommended items to bring include sunglasses, sun hat, swimwear, towel, and sunscreen, with large bags and luggage not permitted on the boat.

You can check availability for your dates here:

Tour Overview and Pricing

The tour includes visits to the Keri Caves, Marathonissi Island, and opportunities for turtle spotting.

Priced from $27.20 per person, the 3-hour tour departs from Agios Sostis harbor in Laganas.

Customers can take advantage of free cancellation up to 24 hours in advance for a full refund, and a reserve now & pay later option is available.

The glass-bottom boat tour allows visitors to swim in the Keri Caves, accessible only by boat, and visit the loggerhead turtle breeding ground of Marathonisi Island.

The glass-bottom boat tour allows visitors to explore the Keri Caves and visit the loggerhead turtle breeding ground of Marathonisi Island.

Snacks, drinks, and ice cream are available for purchase on the island.

Looking for more options in Agios Sostis? We've reviewed plenty of other experiences.

Activities and Highlights

The glass-bottom boat tour from Laganas allows visitors to fully enjoy the natural wonders of the region.

The highlight of the tour is the opportunity to:

Swim in the breathtaking Keri Caves, accessible only by boat.
Visit Marathonisi Island, a renowned loggerhead turtle breeding ground.
Capture stunning photos and enjoy the scenic views of the National Marine Park of Zakynthos.

Snacks, drinks, and ice cream are available for purchase on Marathonisi, allowing guests to refuel and fully savor the experience.

With activities catering to both adventure-seekers and nature enthusiasts, this tour offers an unparalleled glimpse into the region’s stunning marine ecosystem.

Meeting Point and Logistics

Participants depart for the tour from the Agios Sostis harbor in Laganas.

They’ll look for the distinctive Nautilos Flag to identify the boat. The tour includes hotel pickup and drop-off, making it a convenient option.

Once aboard, guests can sit back and enjoy the scenic journey to the National Marine Park of Zakynthos.

The glass-bottom boat offers panoramic views of the sparkling waters and lush landscapes as the tour makes its way to the main destinations, including Marathonisi Island and the Keri Caves.

What to Bring and Restrictions

Recommended items for the tour include sunglasses, a sun hat, swimwear, a towel, and sunscreen to ensure a comfortable and safe experience.

Guests are advised to avoid bringing large bags or luggage, as they aren’t permitted on the boat.

The tour has the following key restrictions:

No luggage or large bags allowed.
No smoking on the boat.
Respect the natural environment and wildlife.

Adhering to these guidelines will contribute to a smooth and enjoyable excursion, allowing participants to fully enjoy the beauty of Keri Caves, Marathonissi Island, and the opportunity to spot loggerhead turtles.

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Customer Reviews and Ratings

Boasting an impressive overall rating of 4.3 out of 5 stars based on 311 reviews, the Agios Sostis: Marathonissi and Turtle Spotting tour has received overwhelmingly positive feedback from past participants. Many lauded the incredible opportunity to see turtles in their natural habitat, with one UK reviewer, Naomi, describing it as "incredible." Tourists from Spain and the UK, like Santiago and Babs, also raved about the "amazing time" and "fun guide." The tour’s highlights, including swimming in Keri Caves and visiting the turtle breeding ground of Marathonisi Island, have left a lasting impression on guests.

| Reviewer | Location | Rating |

| — | — | — |

| Naomi | UK | Incredible to see turtles in their natural habitat. |

| Santiago | Spain | Amazing time, fun guide. |

| Babs | UK | Amazing day trip, saw turtles, swam, and snorkeled. |

| – | – | – |

There's plenty more to explore in Agios Sostis

Exploring the Keri Caves

Guests embark on a glass-bottom boat tour from Laganas, traversing the waters to reach the secluded Keri Caves. These underwater caves are only accessible by boat, offering a truly unique experience.

Once at the caves, guests can:

Swim in crystal-clear waters, marvel at natural rock formations, and explore the hidden coves and crevices of the Keri Caves.

Swim in the crystal-clear waters, marveling at the natural rock formations.
Capture breathtaking photos of the cave’s interior, with light filtering through the water’s surface.
Explore the hidden coves and crevices, discovering the cave’s diverse marine life.

The Keri Caves provide a tranquil escape, allowing visitors to enjoy the stunning natural beauty of the National Marine Park of Zakynthos.

Discovering Marathonisi Island

After exploring the captivating Keri Caves, the tour continues to the enchanting Marathonisi Island. This pristine islet is a loggerhead turtle breeding ground, offering visitors a chance to witness these majestic creatures in their natural habitat. Guests can swim, snorkel, and capture stunning photos of the island’s scenic beauty. Refreshments like snacks, drinks, and ice cream are available for purchase on the island, enhancing the overall experience.

| Activities | Highlights |

| — | — |

| Glass-bottom boat tour | Swim in tranquil waters |

| Turtle spotting | Capture memorable photos |

| Snorkeling | Enjoy scenic views |

| Swimming | Purchase snacks and refreshments |

| Strolling the island | |

Spotting Loggerhead Turtles

Spotting loggerhead turtles is the highlight of the Marathonisi Island experience. The island is a protected breeding ground for these magnificent creatures.

Visitors can expect:

Observing the turtles swimming and resting on the beaches.
Witnessing hatchlings emerging from their nests and making their way to the sea.
Learning about the turtles’ biology and conservation efforts from the knowledgeable tour guides.

The tranquil, secluded nature of Marathonisi provides an unparalleled opportunity to witness these endangered species in their natural habitat.

It’s a truly awe-inspiring and unforgettable experience for nature enthusiasts and eco-travelers alike.

Things To Know

Are Life Jackets Provided During the Boat Tour?

Yes, life jackets are provided for passengers during the boat tour. The tour operator ensures the safety of participants by requiring everyone to wear a life jacket while on the water.

Can I Bring My Pet on the Tour?

Pets are not allowed on the tour. The tour operator’s policies prohibit bringing pets in order to ensure the safety and enjoyment of all passengers. Guests are advised to leave their pets at home when joining this boat excursion.

Is There a Minimum Age Requirement for Participants?

There’s no minimum age requirement for this tour. Children are welcome, though parents should supervise their little ones. The tour is suitable for all ages, providing a fun and educational experience for the whole family.

Can I Book the Tour for a Private Group?

Yes, the tour can be booked for a private group. The tour operator offers group rates and the option to customize the experience. Guests can inquire about private group bookings for a more personalized tour.

Is the Tour Wheelchair Accessible?

The tour isn’t wheelchair accessible. The activities, such as the glass-bottom boat ride and swimming in the Keri Caves, require navigating uneven terrain and steps that would be challenging for wheelchair users. However, the tour operator may be able to accommodate special needs with advance notice.

Sum Up

Agios Sostis offers an unforgettable adventure, allowing visitors to explore Marathonissi Island, the stunning Keri Caves, and witness the remarkable loggerhead turtles in their natural habitat. Aboard a glass-bottom boat, participants can swim in the enchanting caves and enjoy the breathtaking National Marine Park of Zakynthos, making it a perfect destination for nature enthusiasts and adventure-seekers alike.

You can check availability for your dates here: