THE ADVENTURE COLLECTIVE® · Independent discovery and booking for outdoor travel
Glide from Laganas into the sheltered bays of southern Zakynthos on a three-hour boat tour that pairs swimming at Marathonissi with the cliff caverns of Keri and Caretta caretta turtle spotting. Small boats, a glass bottom and timed swim stops make this a compact coastal adventure.
Glide from Laganas into the sheltered bays of southern Zakynthos on a three-hour boat tour that pairs swimming at Marathonissi with the cliff caverns of Keri and Caretta caretta turtle spotting. Small boats, a glass bottom and timed swim stops make this a compact coastal adventure.
A low sun sharpens the limestone cliffs as the boat slips out of Laganas; the sea opens, bright and ringing, and the hull’s glass-bottom panel gives a first glimpse of blue below. Within minutes the island shapes—Marathonissi’s sandy crescent and the dark mouths of the Keri Caves—slide into view. The guide eases the throttle, shade drifts over the benches, and the bay becomes a small theater where turtles surface between breaths.
Verified experiences and guided adventures in the surrounding area.
Operated by YOTOMU · Laganas, Ionian Islands
A low sun sharpens the limestone cliffs as the boat slips out of Laganas; the sea opens, bright and ringing, and the hull’s glass-bottom panel gives a first glimpse of blue below. Within minutes the island shapes—Marathonissi’s sandy crescent and the dark mouths of the Keri Caves—slide into view. The guide eases the throttle, shade drifts over the benches, and the bay becomes a small theater where turtles surface between breaths.
Zakynthos’ south coast is carved from Pliocene limestone and marine terraces; cliffs here have been hollowed by waves into narrow caverns and vaulted grottos that boats can skirt or, where openings allow, enter. Marathonissi (Turtle Island) has no permanent residents today but is an important nesting area for Caretta caretta, protected within the National Marine Park of Zakynthos since the 1980s. Local fishing and salt trade shaped coastal villages; now tourism and conservation share the shoreline.
Expect three focused hours: a swim and beach stop on Marathonissi’s sandy crescent, a swim/boat loop around Keri Caves with time for photos, and guided turtle spotting in Laganas Bay. The boats carry up to 23 passengers, with shaded seating, a rear sundeck and a glass bottom for shallow viewing.
Practical notes: bring reef-safe sunscreen, a swimsuit, towel and a small waterproof camera. Buy extra snacks and water in Laganas—refreshments on Marathonissi are limited. Respect wildlife rules: no chasing or touching turtles, keep noise low, and re-board promptly after swims. The trip skews easy physically but offers vivid coastal geology, clear snorkeling and a rare chance to see nesting-area turtles close to shore.
Tours typically depart from the Laganas/Bay area; check your voucher for the exact pier and boarding time.
Turtle sightings are common in the nesting season but not guaranteed; guides know high-probability areas and will search responsibly.
Yes—boats have shaded seating and deck space; non-swimmers can enjoy the scenery though swims require basic confidence in the water.
Boats may have limited drinks; it’s recommended to buy water and snacks in Laganas before departure and expect minimal services except on Marathonissi.
YOTOMU operates guided outdoor trips and adventures with an emphasis on safety, stewardship, and memorable experiences.
A low sun sharpens the limestone cliffs as the boat slips out of Laganas; the sea opens, bright and ringing, and the hull’s glass-bottom panel gives a first glimpse of blue below. Within minutes the island shapes—Marathonissi’s sandy crescent and the dark mouths of the Keri Caves—slide into view. The guide eases the throttle, shade drifts over the benches, and the bay becomes a small theater where turtles surface between breaths.
A low sun sharpens the limestone cliffs as the boat slips out of Laganas; the sea opens, bright and ringing, and the hull’s glass-bottom panel gives a first glimpse of blue below. Within minutes the island shapes—Marathonissi’s sandy crescent and the dark mouths of the Keri Caves—slide into view. The guide eases the throttle, shade drifts over the benches, and the bay becomes a small theater where turtles surface between breaths.
Zakynthos’ south coast is carved from Pliocene limestone and marine terraces; cliffs here have been hollowed by waves into narrow caverns and vaulted grottos that boats can skirt or, where openings allow, enter. Marathonissi (Turtle Island) has no permanent residents today but is an important nesting area for Caretta caretta, protected within the National Marine Park of Zakynthos since the 1980s. Local fishing and salt trade shaped coastal villages; now tourism and conservation share the shoreline.
Expect three focused hours: a swim and beach stop on Marathonissi’s sandy crescent, a swim/boat loop around Keri Caves with time for photos, and guided turtle spotting in Laganas Bay. The boats carry up to 23 passengers, with shaded seating, a rear sundeck and a glass bottom for shallow viewing.
Practical notes: bring reef-safe sunscreen, a swimsuit, towel and a small waterproof camera. Buy extra snacks and water in Laganas—refreshments on Marathonissi are limited. Respect wildlife rules: no chasing or touching turtles, keep noise low, and re-board promptly after swims. The trip skews easy physically but offers vivid coastal geology, clear snorkeling and a rare chance to see nesting-area turtles close to shore.