Kleftiko Boat Tour

A cluster of white volcanic arches, sea caves and rock pillars on Milos's remote southwest coast, with no road to it. The name comes from kleftes, the pirates said to have sheltered in the caves. Geologically it is the same story as the rest of Milos - soft pale volcanic rock cut by the sea into tunnels and arches standing in very clear water. There is no ticket, no facility, no kiosk and nobody there apart from boats. That combination of famous and unreachable is exactly why 28 of the 57 Milos boat trips we track are built around it.

You can walk to the edge of the bay in about 40 minutes, and you cannot reach the caves on foot. A real trail runs down to a swimming spot at Kleftiko, reached by a rough unsealed road, and it is a fine walk with an excellent view. But the bay is framed by high cliffs, so there is no way to continue along the water - the arches and caves that make Kleftiko famous are accessible only from a boat, or by swimming out across the bay to them. Treat the hike as a genuinely good thing to do and not as a substitute. Anyone hoping to save the price of a cruise this way should know what they will and will not see.

It depends on whether you want time at the caves or the journey there. The semi-private all-inclusive sailing trip at about $151 holds 4.8 from 919 verified reviews and carries the platform's certified-supplier flag. The guided day cruise with lunch at about $163 rates 5.0 from 838. If maximising time at Kleftiko is the priority, the half-day speedboat at about $157 (4.9, 680 reviews) reaches it in a fraction of the time and spends the difference there. And if you want Polyaigos as well, only a full day reaches both. Check dates.

A half day is enough for Kleftiko alone; a full day is only necessary if you also want Polyaigos. This is the clearest decision on the island and it is geographic rather than a matter of value. Polyaigos is a separate uninhabited island east of Milos, and reaching it turns the trip into a full day. So if your list is Kleftiko plus swimming, book the half day and keep your afternoon. If the white cliffs in the photograph you saved are Polyaigos, no half-day trip will get you there - check the stop list rather than the thumbnail.

Yes, and it is the main event rather than an extra. Boats anchor in the bay and most trips allow a long stop in the water among the arches and caves. Several include snorkelling equipment and some carry paddleboards. The water is deep and very clear, there is no beach to stand on, and the crew stay with the group with flotation available. It suits confident swimmers best. If you do not swim, Kleftiko is still worth going for - but be aware that a good hour of the trip is a swim stop you will be watching.

Into some of them, depending on the boat's size and the sea state. Smaller boats and inflatables can pass into the larger openings; catamarans and bigger sailboats generally anchor outside and let people swim in. Several operators carry a tender for exactly this. If getting inside the caves matters to you, look for a smaller vessel or an itinerary that mentions a tender, and accept that a choppy day will curtail it - the crew will not take a boat into a cave mouth in swell. This is one of the places where the wind changes what you actually get, not just how comfortable you are.

The bay collects boats in high season, and it is nothing like a crowded beach. Because the only access is by sea, the number of people present is capped by the number of boats anchored, and they spread across a large bay. Morning trips generally find it quieter than midday, when the half-day and full-day fleets overlap. There is no queue, no ticket barrier and nowhere to stand about - which makes it feel considerably less busy than the visitor numbers would suggest. If solitude is the goal, an early departure or a shoulder-season date does more than any choice of operator.

They are often the ones that still run - and they get rerouted or cancelled at the extremes. Kleftiko sits on the southwest coast, sheltered from the meltemi, the strong northerly that blows through the Aegean summer. That geography works in your favour: the north of the island can be unswimmable while Kleftiko stays workable. But a hard blow still shortens cave access, makes the crossing uncomfortable and can stop a trip outright. Book with free cancellation, and treat a rerouted itinerary as normal seamanship rather than an operator letting you down. More on the wind.