Get a closer look at the underwater world as you explore the Gulf of Kefalos. Perfect for families, our glass-bottom boat adventure makes a fascinating way to experience this stretch of coast. Our first stop is the pinprick Kastri Island, where you can visit a church, stroll around the island, or even stop for a swim at one of the inviting small beaches. Be sure to take a few snaps, as it's the most photographed spot on Kos.

Next, it's off to Camel Beach, a pretty cove flanked by rocks and lapped by azure waters - the perfect backdrop for a swim. Finally, you'll visit the famous Paradise Beach, where the highlight is witnessing the unique bubble phenomenon, a mesmerizing area where streams of bubbles rise into the water from the sea bed.

Our glass-bottom boat ensures you can admire the underwater wonders of the Aegean as you travel from place to place. Don't forget your camera to capture your unforgettable boat trip around the Gulf of Kefalos.

Family experience and enjoyed by all ages Just about the right time on board the boat

It was a lovely trip, sadly I felt sick on the coach due to all the windy bends and again on the boat and was sick on the way back. Encourage others to take anti sickness tablets. The guide was informative and funny.

Had family 9 adults 6 children only looking for a short trip. This fitted perfectly kids all had swim off the boat Lovely scenery crew really competent and friendly. Recommended

Good fun thanks

Absolutely nothing to see apart from a pillar that had fallen to the ocean floor Swam in bay then moved to another bay about 500 meters for our second swim total waste of time

Great trip the guide was a real character and kept it interesting for all 2 30 minute swim stops at paradise beach and camel beach unfortunately current was to strong at bubble beach so couldnt swim there, a stop off at Kastri island also on the way to have a look at the chapel and learn some interesting facts. Would add glass bottom as guide told us not great as fish scared of the shadow of the boat!!

Why you’ll love this…

Explore the Gulf of Kefalos with stops at sun-kissed beaches
Visit Kastri island, the most photographed spot on Kos
Experience the remarkable bubble phenomenon at Paradise Beach
Admire the underwater world as you travel by glass-bottom boat

Important to know

You can book this excursion with or without transfers
Food and drinks not included

Cancellation policy

Receive a 100% refund if you cancel up to 1 day before the experience begins.

What’s included

Boat cruise
Swim stops
Snorkeling

This experience meets the Global Sustainable Tourism Council criteria. By choosing this experience you can protect the places you love, care for the environment and support local communities.

Booking fee

Good news! No extra fees are applied to this booking.

Pickup points

To see which pickup points are available, check under availability & prices.

Provider

TUI Hellas Travel, Tourism and Airlines SA

What people say about this experience

3.9/5

All reviews are verified

Based on 325 reviews

Review categories

Service

3/5

Safety

4.2/5

Staff

5/5

Value for money

5/5

All ratings (325)

5 stars (108)

33%

4 stars (131)

40%

3 stars (57)

18%

2 stars (17)

1 star (12)

C
Christine Potter
Travelled with family
13 August 2026
5
United Kingdom
Family experience and enjoyed by all ages Just about the right time on board the boat
K
Kingwell
Travelled with family
7 August 2026
4.2
United Kingdom
It was a lovely trip, sadly I felt sick on the coach due to all the windy bends and again on the boat and was sick on the way back. Encourage others to take anti sickness tablets. The guide was informative and funny.
A
Alby.
Travelled with family
6 August 2026
4.6
United Kingdom
Had family 9 adults 6 children only looking for a short trip. This fitted perfectly kids all had swim off the boat Lovely scenery crew really competent and friendly. Recommended
X
X
Travelled with family
4 August 2026
4.2
United Kingdom
Good fun thanks
R
Rob Breen
Travelled as a couple
27 July 2026
1
United Kingdom
Absolutely nothing to see apart from a pillar that had fallen to the ocean floor Swam in bay then moved to another bay about 500 meters for our second swim total waste of time
P
Phil
Travelled with family
8 July 2026
4.2
United Kingdom
Great trip the guide was a real character and kept it interesting for all 2 30 minute swim stops at paradise beach and camel beach unfortunately current was to strong at bubble beach so couldnt swim there, a stop off at Kastri island also on the way to have a look at the chapel and learn some interesting facts. Would add glass bottom as guide told us not great as fish scared of the shadow of the boat!!