Zakynthos: Glass Bottom Turtle Boat Tour to Keri Caves & Islands — A Detailed Look
If you’re pondering a boat adventure in Zakynthos, this 3-hour glass-bottom tour offers a compelling mix of scenery, wildlife, and unique stops. While I haven’t personally taken this exact trip, reviews and descriptions paint a clear picture of what you can expect—and it’s quite promising for those who love nature and striking views.
What I like about this experience is how it balances wildlife viewing with stunning scenery. The chance to catch glimpses of the Caretta caretta turtles in their natural habitat, coupled with visits to the beautifully dramatic Keri Caves and the charming Cameo Island, makes it feel like a well-rounded day on the water. Plus, the price point—just over $70 per person—seems fair given the variety of stops and inclusions.
One thing to consider, however, is the timing and group size. The tour is scheduled for about 3 hours, starting at noon, which is perfect for a relaxed day but might feel rushed if you’re keen on spending more time at each site. Also, since snorkeling gear isn’t included, you’ll want to bring your own if underwater exploring is your goal.
This tour is best suited for travelers who enjoy sailing, nature, and scenic photography. If spotting turtles in their natural environment and exploring caves with vivid waters appeal to you, this could be a highlight of your trip. It’s a solid pick for those who want a glimpse of Zakynthos’ best natural spots without a huge time commitment.
Key Points

- Wildlife Magic: The chance to see and photograph Caretta caretta turtles in their natural habitat.
- Beautiful Stops: Includes Cameo Island, Keri Caves, Marathonisi Island, and Laganas Bay.
- Short & Sweet: About 3 hours, making it manageable even on a busy schedule.
- All-Inclusive Feel: Private transport included, ensuring smooth transitions between sites.
- Snorkeling Gear: Not included, so plan to bring your own if underwater exploration excites you.
- Good Value: At roughly $71, the price covers multiple stops and a memorable experience.
The Experience in Detail
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Starting Point and Timing
The tour kicks off at 12:00 pm from Agios Sostis port, a convenient spot for those staying nearby or using local transportation. The trip lasts about three hours, which feels about right—long enough to enjoy the scenery and each stop without feeling exhausted or rushed.
The Itinerary Breakdown
Cameo Island (30 minutes):
It’s a quick visit but one worth doing for the photos. The island’s white sheets flowing around create a kind of whimsical scene—something you’ll want to capture. It’s a peaceful photo op and a good way to kick off the tour.
Keri Caves (1 hour):
This is often the highlight for many travelers. The caves are striking, with crystal-clear waters inviting you to swim inside. If you bring your snorkeling kit, you’ll love exploring the underwater world beneath the caves. Being able to sail close enough to see the caves’ grandeur and then jump in for a swim makes this stop quite memorable.
Marathonisi Island (1 hour):
This private beach is perfect for sunbathing, swimming, or just relaxing. Known as Turtle Island, it’s the nesting ground for turtles—so you might just spot some in the surrounding waters. One reviewer noted, “swimming and sunbathing here was a highlight,” which resonates with how peaceful and scenic this spot is.
Laganas Bay (30 minutes):
The final leg involves turtle spotting around Laganas Bay. The crew actively tries to find the Caretta caretta turtles, making it an engaging part of the trip. Some reviews mention trying to photograph these elusive creatures, which adds a thrill for wildlife lovers.
What You’ll Experience
Throughout the tour, you’ll enjoy sailing on a glass-bottom boat, which allows for underwater viewing without getting wet—great for casual observers or those not keen on snorkeling. The boat’s route is designed to give you the best chance to see the turtles and admire the turquoise waters.
The boat’s size caps at 60 travelers, meaning it’s large enough for a lively atmosphere but small enough for a personal feel. The private transport component helps keep things smooth, with no fuss about logistics once you’re on board.
What Reviewers Say
Most travelers rate this experience a perfect 5 out of 5, emphasizing the stunning scenery and the chance to see turtles in the wild. One reviewer mentioned, “the boat got us through the caves and we had quite good swimming time in the open sea,” which highlights the enjoyable balance of sailing and swimming.
However, not all reviews are glowing. One review pointed out, “we were swimming in circles around a turtle,” implying that the boat’s crew is permitted to sail at maximum speed around the turtles, which some might find a bit disruptive. It’s a reminder that wildlife viewing can sometimes feel a bit rushed, but it’s a common trade-off in guided tours.
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Practical Considerations
- Snorkeling gear isn’t included: Bring your own if underwater exploration excites you.
- Timing: Starts at noon, ending around 3 pm, which works well for most schedules.
- Weather dependency: Like all boat trips, good weather is crucial. If canceled, you’ll be offered a different date or a full refund.
- Cost vs. value: At $71.29, it’s an accessible price for a tour with multiple stops and wildlife viewing.
Who Will Love This Tour?

This trip suits travelers who enjoy scenic boat rides, wildlife spotting, and swimming. If you’re into photography, the views from the boat and the caves are superb. It’s also great for those who want a relaxed, half-day getaway that combines nature and adventure without overloading your schedule.
While it’s not explicitly marketed as family-friendly, families with children comfortable in the water or boat trips will likely enjoy it. But if your kids are sensitive to water or boat rides, keep that in mind.
Zakynthos: Glass Bottom Turtle Boat Tour to Keri Caves & Islands
“In general, not my worst experience. The boat got us through the caves and we had quite good swimming time in the open sea but there were several d…”
FAQ Section

Is snorkeling gear included?
No, snorkeling kits are not included, so if you plan to explore underwater, bring your own.
Where does the tour start and end?
It begins at Agios Sostis port and returns there at the end of the 3-hour trip.
What time does the tour start?
It starts at 12:00 pm, giving you a relaxed midday adventure.
How long is each stop?
Cameo Island is about 30 minutes, Keri Caves about an hour, Marathonisi around an hour, and the turtle spotting near Laganas Bay roughly 30 minutes.
Is this tour suitable for people with mobility issues?
The description doesn’t specify, but since it involves boat stops and swimming, it’s best suited for those comfortable with water activities and walking.
What is the maximum number of travelers?
Up to 60 people can join, ensuring a lively but manageable group size.
To sum it up, this Zakynthos boat tour offers a well-rounded experience for those eager to enjoy the island’s natural beauty, especially if spotting turtles and exploring caves are high on your list. It’s a straightforward, reasonably priced adventure that combines scenic sailing, wildlife encounters, and relaxing stops, making it a solid choice for a half-day outing. If your goal is to see Zakynthos from the water with chances to photograph turtles and swim in crystal waters, this tour fits the bill nicely.
On the other hand, if snorkeling gear or more in-depth exploration is your thing, you might want to look into other options or bring your own gear along. But overall, for a balance of comfort, views, and wildlife, this trip is likely to leave you with some great memories of Zakynthos.
More Boat Tours & Cruises in Zakynthos
More Tours in Zakynthos
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- Zakynthos: Turtles, Marathonisi & Keri Caves Speedboat Tour
- Zakynthos Private Tour to Navagio Shipwreck by Land and Sea
- Shipwreck and Blue Caves Yacht Tour
- Zakynthos Private Tour in Black Elegance Luxury Speedboat
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- Zakynthos: Turtles, Marathonisi & Keri Caves Speedboat Tour
- Zakynthos Private Cruise to Shipwreck Beach & Blue Caves
- 8-day/7-night Zante Cruise
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- Ancient Olympia Full Day Trip from Zakynthos
- Mizithres Sunset Cruise in Zakynthos
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