REVIEW · SEA CAVE

From Ag Anna: Rina’s Cave and Ano and Kato Koufonisi Cruise

★ 4.2 · 504 reviews 8.5 hours From $94 Operated by Naxos Island Tours · Bookable on GetYourGuide
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Rina’s Cave is the star of this long day at sea. You reach it only by boat, swim into its clear water, and can walk to a nearby pebble beach with a freshwater spring. Then the 25-meter Mikros Kosmos II carries you onward to Koufonisi for a generous lunch, more swimming, and three hours to explore.

I like the combination of active swimming stops and free island time. You are not rushed through a village with a guide waving a flag. I also like the food setup: souvlaki, pasta, rice, potatoes, salad, bread, fruit, and local dishes are prepared onboard, with vegetarian choices and drinks included at lunch.

The tradeoff is the amount of time spent sailing. The return can take more than two and a half hours when the wind rises, and the boat may feel short on comfortable seating. This is a better choice for confident swimmers who enjoy a full day on the water than for anyone prone to seasickness or looking for cultural commentary.

Key points to know before booking

From Ag Anna: Rina's Cave and Ano and Kato Koufonisi Cruise - Key points to know before booking

  • Rina’s Cave is reached only by sea: You get about 90 minutes for swimming, snorkeling, jumping from the boat, and visiting the nearby pebble beach.
  • Lunch is a real meal, not a snack: Expect souvlaki, salads, potatoes, pasta, rice, local dishes, bread, fruit, and vegetarian options.
  • Ano Koufonisi gives you three free hours: Walk the cobbled streets, swim at a nearby beach, shop, or use a low-cost sea taxi to reach other beaches.
  • Kato Koufonisi depends on conditions: The uninhabited island is beautiful, but strong wind can change the plan.
  • Get there early for a sunbed: The front beds are limited and may be claimed for the day.
  • This is not a guided sightseeing cruise: The crew can help you, but no guide provides regular history or commentary.

What this Agia Anna cruise is really like

From Ag Anna: Rina's Cave and Ano and Kato Koufonisi Cruise - What this Agia Anna cruise is really like

This is an 8.5-hour outing built around the pleasures of a Greek island day: sun, salt water, a slow boat ride, and a plate of homemade food. You leave the taxi piazza at Agia Anna at about 9:45 a.m. and return around 7 p.m.

The boat is the Mikros Kosmos II, a sizable sailing vessel with sunbeds, loungers, shaded areas, snorkel gear, life jackets, and foam sea noodles. It is designed more for relaxing than for formal sightseeing. You can sit, read, sunbathe, swim, and watch Naxos slide past.

That distinction matters. I would not book this if you want a captain narrating every island, explaining ancient sites, or leading a walking tour. I would book it if your ideal day includes a long, scenic ride, several chances to get in the water, and enough free time to make your own plans.

The crew has a family-run feel, and the cooking is one of the strongest parts of the day. Food is served after the first swim, when you will likely be ready for a substantial meal rather than a small sandwich. The portions are large, and the spread includes both meat and vegetarian choices.

More Sea Cave Boat Tours in Greece

The morning sail from Agia Anna

From Ag Anna: Rina's Cave and Ano and Kato Koufonisi Cruise - The morning sail from Agia Anna

The meeting point is the dock at the taxi piazza in Agia Anna. Look for the Mikros Kosmos II. A free transfer is available from certain meeting points, but you need to ask the operator in advance about locations and pickup times.

Arrive early. The most sought-after sunbeds are at the front, and there are only a limited number. Some people keep their belongings there even while visiting the island, so you may end up on the upper deck or in a spot with less shade if you arrive later.

The route follows the west coast of Naxos. The first sailing stretch takes about an hour and a half, giving you wide sea views and time to settle into the pace of the day. The boat is not a speedboat, which is part of its charm and part of its limitation. You get a pleasant ride, but the journey to and from Koufonisi takes a sizeable portion of the schedule.

Bring a book or a simple game if you enjoy quiet time at sea. Also bring a hat, sunglasses, sunscreen, swimwear, a towel, beach clothes, and any personal medicine you need. The sun can be strong, and shade is not guaranteed for every seat.

Rina’s Cave and the first swim

From Ag Anna: Rina's Cave and Ano and Kato Koufonisi Cruise - Rina’s Cave and the first swim

After roughly 90 minutes, the boat reaches Rina’s Cave on the southern coast of Naxos. This is the most distinctive stop because it cannot be reached by road or an ordinary beach walk. The boat anchors offshore, and you enter the water to swim toward the cave.

You have about 90 minutes here. Confident swimmers can swim into the cave, use the provided snorkel equipment, or jump from the boat. Foam noodles and life jackets are available, so you do not have to spend the whole stop swimming without support.

Near the cave is a pebble beach and a freshwater spring. The spring gives the stop an extra point of interest, but the beach is reached through the water, not by a normal road or dock. Wear secure footwear if you plan to step onto the pebbles, and keep your expectations practical: this is a wild swimming stop, not a developed beach facility.

The jumping option is for people comfortable with it. You can simply swim from the boat if that suits you better. Non-swimmers are not a good fit for this excursion, and anyone uneasy in open water should think carefully before booking.

The water is the main attraction. Several stops on this cruise are about getting into the sea, not simply looking at it from the deck. If you want the most from Rina’s Cave, bring a towel and be ready to spend much of the stop in the water.

A generous Naxian lunch on board

From Ag Anna: Rina's Cave and Ano and Kato Koufonisi Cruise - A generous Naxian lunch on board

While you swim, the crew prepares lunch. The meal is described as a barbecue, though the full spread goes well beyond grilled meat. You can expect Greek salad, oven potatoes, pasta, rice with vegetables, fresh bread, fruit, and a local cooked dish such as spetzofai, along with pork or chicken souvlaki.

Vegetarian choices include Greek salad, potatoes, and rice with vegetables. You should tell the operator about food allergies before the trip so the crew can explain which dishes are suitable.

Water is provided throughout the day. During lunch, Coca-Cola, Sprite, orange juice, and wine are included. Beer, cocktails, extra soft drinks, and snacks cost more and can be bought onboard.

I like the timing of the meal. Swimming works up an appetite, and the food arrives at the point when a light breakfast no longer seems like enough. The meal is simple, filling, and based on familiar Greek dishes rather than formal restaurant cooking. If you have a large breakfast, you may not be hungry for everything.

The wine is included, though it should be treated as a pleasant extra rather than a special tasting experience. Coffee and beer may be available for an additional charge, but bring a little money if those matter to you.

Same harbour, a different day on the water:

Kato Koufonisi, the quiet island stop

From Ag Anna: Rina's Cave and Ano and Kato Koufonisi Cruise - Kato Koufonisi, the quiet island stop

If the weather allows, the boat may stop at Kato Koufonisi. This island is uninhabited, so there are no village streets or full range of services to explore. Its appeal is the water, the quiet setting, and the feeling of reaching a place with very little development.

Weather controls this part of the schedule. Strong wind can make it impractical or unsafe, and the crew may change the route. On some departures, the stop has been shortened or skipped, while another island stop received more time instead.

That flexibility is sensible on the Aegean, but it is worth understanding before you book. You are paying for a day on the water with planned destinations, not a guarantee that every stop will happen in exactly the same order.

Kato Koufonisi suits you if you want a peaceful swim and a natural setting. If you need shops, cafés, or a clear walking route, Ano Koufonisi is the more useful stop.

Three hours to make your own plans on Ano Koufonisi

From Ag Anna: Rina's Cave and Ano and Kato Koufonisi Cruise - Three hours to make your own plans on Ano Koufonisi

Ano Koufonisi is the main destination and the longest stop. You get about three hours on your own, which is enough time to combine a walk with a swim, though not enough for a leisurely tour of every corner.

The village has cobbled lanes and a compact island feel. You can wander through the alleys, browse shops, stop for a drink, or walk toward a nearby beach. The shore water is remarkably clear, and Ammos Beach is one of the named highlights from the day.

You can also pay for a low-cost sea taxi to reach other beaches. This is useful if you would rather spend your three hours swimming than walking. Ask about timing before you leave the boat, since you need to return to the departure point on schedule.

The stop rewards simple planning. I would choose one main goal, such as a village walk followed by Ammos Beach, rather than trying to cover the entire island. Bring your beachwear and towel with you from the boat. Three hours sounds generous, but changing, walking, swimming, and finding your way back use time quickly.

The drawback is that the island stop can feel too long if you do not enjoy swimming, shopping, or wandering without a guide. There is no organized walking tour, so you are responsible for your own time. For some people, that freedom is the best part of the trip. For others, it may feel like a long pause between boat rides.

The long return to Agia Anna

From Ag Anna: Rina's Cave and Ano and Kato Koufonisi Cruise - The long return to Agia Anna

The boat leaves Ano Koufonisi at about 5:15 p.m. and aims to reach Agia Anna around 7 p.m. The return may take longer when the wind picks up. This is the part of the trip most likely to test your patience, especially after a full day in the sun.

Use the ride home as downtime. Find a place to sit, drink water, and enjoy the views. On some departures, the crew serves watermelon and a homemade sweet during the return sail, a welcome touch after swimming and walking.

The sunset can be beautiful, but do not count on a particular sunset scene because weather and timing vary. The important point is that this is a full day, not a short boat transfer with a quick swim attached.

If you are prone to seasickness, take that seriously. The itinerary includes long stretches at sea, and one stop can involve a lengthy return. The activity is specifically unsuitable for people prone to seasickness and non-swimmers.

Boat comfort, space, and safety details

From Ag Anna: Rina's Cave and Ano and Kato Koufonisi Cruise - Boat comfort, space, and safety details

The Mikros Kosmos II has a good amount of deck space, sunbeds, loungers, and some shade. It is large enough to feel comfortable on many departures, though capacity and seating can vary. Front sunbeds are limited, so early arrival helps.

The boat provides snorkels, life jackets, lifebuoys, and foam noodles. These are useful, but you should still be honest about your swimming ability. The activity is not intended for wheelchair users, and high-heeled shoes are not allowed.

One practical point deserves attention: the cruise does not include a formal guide. The crew is available for help, but regular historical information is not part of the experience. Communication in English can also be limited at times, so do not expect detailed explanations about the coastline or islands.

A clear safety briefing is something I would like to see handled carefully on every departure. Bring your own common sense as well: follow crew instructions, use the available flotation equipment, and avoid jumping if you are not fully comfortable.

Is the $94 price good value?

From Ag Anna: Rina's Cave and Ano and Kato Koufonisi Cruise - Is the $94 price good value?

At $94 per person, the value is strong if you would otherwise pay separately for transport, a boat excursion, lunch, drinks, and access to several swimming locations. You receive a full day aboard a large sailing boat, a substantial meal, water, lunch drinks, snorkel equipment, and time on Ano Koufonisi.

The price also covers the chance to reach Rina’s Cave and Kato Koufonisi by sea. Those are not ordinary Naxos beach stops, and the boat makes them accessible in one day.

The value is less convincing if you dislike long sailing times, need a guided explanation, or want luxury seating for the entire journey. You are paying for a relaxed group cruise, not a private yacht or a history tour.

For families, the trip can work well with older children who are confident in the water. Unaccompanied minors are not allowed, and the activity is not suitable for non-swimmers. Children who enjoy swimming, noodles, and boat rides may have a wonderful day, but parents should be ready for the long return.

Who should book this cruise?

I would choose this cruise if you want:

  • Several chances to swim in clear Aegean water
  • A memorable cave stop reached only by boat
  • A filling Greek lunch without arranging your own food
  • Three hours to explore Ano Koufonisi independently
  • A relaxed day with sunbeds, sea views, and plenty of open water
  • Good value from one long excursion

I would choose another activity if you want a guided history tour, a fast boat, guaranteed visits to every planned stop, or a short outing with little time at sea.

Book it early in your holiday if you can. That gives you flexibility if wind changes the route, and it lets you keep another day open for a beach or village plan. At the meeting point, arrive early for the best chance of a front sunbed, but do not assume you will have a private spot for the whole day.

Should you book the Mikros Kosmos II?

Yes, if your picture of a perfect Naxos day involves swimming at Rina’s Cave, eating a generous homemade meal, and wandering Ano Koufonisi without a strict guide. The cruise offers a lot for $94, and the strongest parts are the food, friendly crew, clear water, and chance to reach places that are awkward to visit independently.

Think twice if you get seasick, cannot swim, or want constant information about the islands. The boat ride is long, the seating is not unlimited, and weather can alter the route.

For the right person, this is less a sightseeing tour than a full Greek sea day. Bring sun protection, arrive early, tell the crew about allergies, and leave room in your schedule for the return sail.

FAQ

Where does the cruise leave from?

The meeting point is the taxi piazza at Agia Anna, where you will find a dock and the sailing boat Mikros Kosmos II.

What time does the cruise leave and return?

Departure is at about 9:45 a.m. and return is expected around 7 p.m. The total duration is approximately 8.5 hours.

How long do you stay at Rina’s Cave?

The scheduled stop at Rina’s Cave lasts about 1.5 hours. You can swim, snorkel, jump from the boat if comfortable, and visit the nearby pebble beach and freshwater spring.

Is lunch included?

Yes. Lunch includes barbecue-style food such as pork or chicken souvlaki, Greek salad, potatoes, pasta, rice with vegetables, fresh bread, fruit, and local dishes. Vegetarian options are available.

What drinks are included?

Water is provided. During lunch, Coca-Cola, Sprite, orange juice, and wine are included. Beer, cocktails, extra soft drinks, and snacks are available to buy onboard.

How much free time do you get on Ano Koufonisi?

You get about three hours of free time. You can walk through the village, shop, swim at nearby beaches, or use a low-cost sea taxi to visit other beaches.

Is there a guide or historical commentary?

No. The crew is available to help, but the cruise is designed for independent free time and relaxation rather than guided sightseeing or regular historical commentary.

What should you bring?

Bring sunglasses, a sun hat, swimwear, a towel, sunscreen, beachwear, and any personal medication. Arrive early if you want a better chance of getting one of the limited front sunbeds.

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