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Experience Zakynthos on a 3-hour clear boat tour, perfect for turtle spotting, swimming at Marathonissi Island, and exploring Keri Caves with stunning underwater views.
Discover Zakynthos with a unique Glass Boat Swimming Tour that lasts 3 hours and departs from Agios Sostis Harbour. Operated by Abba Travel Zakynthos, this tour offers an up-close view of marine life through the boat’s clear bottom, making it stand out as the first and only in Europe of its kind. With a 4.5-star rating and a small-group experience limited to 10 people, it balances intimate sightseeing with adventure. This tour is especially suited for those eager to spot Caretta Caretta turtles in their natural habitat, enjoy crystal-clear waters, and see Keri Caves and Marathonissi Island in a relaxed setting.
While the tour promises stunning underwater views and multiple swimming stops, it’s essential to note that it has specific restrictions. The activity is not suitable for people with mobility impairments, wheelchairs, or those over 243 lbs. Also, travelers should bring swimwear, towels, sunscreen, and a camera, as well as be prepared for a maximum of 3 hours of exploring in beautiful Western Greece.


This tour begins at the Abba Tours Zante dock, located in Agios Sostis Harbour. The precise coordinates are 37.715248107910156, 20.865299224853516, making it easy to locate with a GPS device.
The meeting point is straightforward, and the tour provider emphasizes flexibility with options to reserve now and pay later. The check-in process is simple, and the live English-speaking guide ensures clear communication and engaging commentary throughout the trip.
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What sets this tour apart is its clear bottom, offering unparalleled underwater views without needing to snorkel or dive. As the boat glides through the marine park, you’ll get a spectacular look at the seafloor, marine life, and maybe even a passing turtle.
Travelers appreciate how the guides explain the local marine environment and spotting tips, making the wildlife sightings more engaging. The stunning vistas and tranquil waters create a relaxing atmosphere, ideal for photography and quiet observation.

One of the most notable highlights is the swimming stop at Marathonissi Island, also known as Turtle Island. The island’s crystal-clear waters and soft sandy beaches make it perfect for a refreshing dip.
This stop allows plenty of time to relax, swim, and enjoy the picturesque surroundings. Because the island is called Turtle Island, it’s a good chance to see Caretta Caretta turtles in their natural habitat, often spotted in the waters nearby.
Next is an exploration of the Keri Caves, a series of dramatic sea caves along the coast. The boat enters these caves, revealing impressive rock formations and narrow passages that make for fantastic photos.
The swimming stop at Keri Caves offers a chance to dive into the clear waters and explore underwater near the caves’ entrance. It’s a highlight for those who love scenic views and a bit of adventure.
More Great Tours NearbyA key attraction of this tour is turtle spotting in the marine park near Laganas Bay. The Caretta Caretta is a protected species, and the natural habitat here is a prime location for observing these fascinating creatures.
The guides are knowledgeable about their behaviors and habitats, helping visitors identify turtles in the water. This aspect of the tour makes it more than just a boat ride—it’s an opportunity to connect with local wildlife in their environment.
Limited to 10 participants, this tour offers a more intimate atmosphere compared to larger boat trips. This setting allows for more personalized attention, better photo opportunities, and direct interaction with the guide.
Travelers who prefer a less crowded experience and more space for comfort will find this small-group approach a significant benefit. It also helps maximize wildlife spotting chances without the distractions of a big crowd.
To make the most of this 3-hour adventure, travelers are advised to bring swimwear, towels, sunscreen, and a camera. Since complimentary water is provided, there’s no need to carry extra drinks, but additional snacks or personal beverages are not included.
The tour excludes pets, baby strollers, large luggage, baby carriages, and electric wheelchairs for safety and operational reasons. These restrictions are important to consider when planning your visit.
This tour is not suitable for individuals with mobility impairments, wheelchair users, or those afraid of heights or epilepsy. Travelers over 243 lbs (110 kg) and over 75 years old are also advised against participating, as safety precautions are in place.
While the experience offers spectacular views and wildlife encounters, it’s best suited for those who are comfortable on a boat and able to sit for 3 hours.
Booking options include reserve now and pay later, giving flexibility in planning. Cancelations are free up to 24 hours in advance, providing peace of mind in case of changing plans.
The English-speaking guides ensure smooth communication, and the private group option is available for those seeking a more exclusive experience.
This 3-hour trip strikes a balance between relaxation and adventure, with stunning underwater vistas and wildlife sightings being the key highlights. The small-group setting ensures a more personalized and engaging experience.
Its unique feature — the only European clear boat with an underwater viewing platform — makes it a must-do for anyone interested in marine life and scenic waterscapes. While it’s not suitable for everyone, especially those with mobility issues, it offers unmatched views for those who can participate.
Travelers seeking a well-organized, intimate boat trip with a focus on turtle spotting and beautiful swimming spots will find this tour to be an excellent choice.
How long is the Zakynthos glass boat tour?
The tour lasts 3 hours, including cruising and swimming stops.
Where does the tour depart from?
It departs from the Abba Tours Zante dock in Agios Sostis Harbour.
Can I reserve my spot and pay later?
Yes, the reserve and pay later option is available, allowing flexible booking.
What should I bring on the tour?
Bring swimwear, a towel, sunscreen, a camera, and water.
Is the tour suitable for children or those with mobility issues?
The tour is not suitable for people with mobility impairments, wheelchairs, or certain health conditions.
What wildlife can I expect to see?
You can expect to spot Caretta Caretta turtles in their natural habitat.
What are the main stops on the tour?
Stops include Marathonissi Island (Turtle Island) and Keri Caves.
Is food or drink included in the tour?
Complimentary water is provided, but no other food or drinks are included.
Are private groups available?
Yes, a private group option is offered for a more exclusive experience.
What makes this tour unique?
It is the only clear boat in Europe with underwater views, offering stunning marine scenery and wildlife encounters.
This detailed review give you a clear picture of what to expect from the Zakynthos: Glass Boat Swimming Tour with Turtle Spotting, helping travelers decide if this 3-hour adventure aligns with their interests and needs.
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