Zakynthos Boat Tour 3 in 1: Turtle spotting, Keri Caves and Marathias Beach

  • New

Experience a boat trip through the spectacular arch of the Keri Caves on Zakynthos and visit the turtle island of Marathonissi. The 3-hour premium excursion from Agios Sostis also includes a stop at Marathias Beach, where you can swim in the thermal waters.

  • Tour / activity duration: ~3 hours
  • Languages: English
  • Transfer: Laganas and Kalamaki
  • The best insider tips
  • English-speaking service
  • Hassle-free booking change or cancellation
  • Usually cheaper than at site

Premium boat tour to Keri Caves and Turtle Island in Zakynthos

Take a wonderful boat trip from the south of Zakynthos to the fabulous arch of the Keri Caves and a small turtle expedition to Marathonisi.

Meetingpoint Agios Sostis

  • Zakynthos Boat Tour Premium (3 hours) - no pickup - per person 25.-€

Pickup Laganas & Kalamaki

  • Zakynthos Boat Tour Premium (3 hours) - with pickup - per person 25.-€
Pass first arch of the Keri Caves

Booking option: From Agios Sostis: Turtle Island - Keri Caves - Marathias Beach

The 3 in 1 boat tour from Agios Sostis combines wonderful highlights of the island into a real premium experience. The observation of the sea turtle Caretta-Caretta will take place in the bay of Laganas, which is its natural habitat and protected by the National Marine Park of Zakynthos. For the interested visitors, this is a unique opportunity to observe and photograph these beautiful animals. Please follow all the rules of the marine park for the protection of the turtles. The boat trip continues to one of the most spectacular sights of Zakynthos, the first arch of the Keri Caves.

Our boat can pass under the arch and then travels along the cliffs and caves, giving you the opportunity to take beautiful photos of the area and capture this memory forever. The thermal waters of Marathias Beach are the highlight of our boat trip. Have your snorkel mask ready when we enter the sea tunnel for the swim stop. The entrance to this tunnel will leave an unforgettable impression, it is the perfect place to observe the crystal clear blue water with the white seabed below, simply beautiful!


  • Capacity: 24 passengers
  • Duration: ~ 3 hours
  • Hours: 11:00 AM
  • Days: daily
  • Months: April - October
  • Languages: English
  • Starting points: Agios Sostis
  • Pick-up: Laganas und Kalamaki


  • Skipper, swim stop(s), boat ride
Important information

Please bring

Swimwear, towel, sun blocker, snacks, snorkeling equipment, water

Detailed description

Premium Boat Tour Zakynthos: Turtles, Keri Caves, Marathias Beach

There is only one way to experience the wonderful cave landscape on the southeast coast of Zakynthos: by boat. Some of the caves and grottoes are so wide open that you can go in by boat or even pass under one of the spectacular rock arches. This is true for the first arch of the famous Keri Caves. An impressive scenery that we want to discover on this boat tour from Agios Sostis. In addition to the caves, the premium boat tour includes a swim stop in front of the turtle island of Marathonisi and a visit to Marathias Beach. The thermal waters of Marathias Beach are the highlight of our excursion. Have your snorkeling goggles ready because our captain is ready to accompany you while swimming in the sea tunnel.

We cannot miss the Turtle Island on this boat trip. Here we will also have a look at the caves and then we will go to the sandy beach, which is also the nesting place of the turtles. A sensitive area where we move carefully and follow the rules of the marine park, which strives to protect the animals. With a bit of luck we will be able to see and photograph the animals in their natural environment during the turtle watching in Laganas Bay. The Caretta-Caretta (or loggerhead turtle) is one of the few species that can still be found in the Mediterranean Sea. After about 3 hours the boat tour ends again in Agios Sostis. If you plan a longer stay at the last stop, we can also pick you up there later with a boat.


Valid on the reserved day or for 12 months after date of purchase if no date has been selected. You will receive the tour operator's details with the purchased ticket. Attention: reservation is required! The reservation can be made through sunbonoo as part of the booking process or later by contacting the tour operator directly via phone or email.

Our customers' questions

How do I receive my tickets?

Where is the meeting point / will I be picked up directly at my hotel when a transfer is possible?

Can I pay in cash directly when the tour / activity starts?

Can I book on short notice?

What happens if the weather is too bad to do the tour / activity?

How does a gift voucher work?

Are discounts possible?

Any questions?