Andronis Luxury Suites

The one thing

Andronis Luxury Suites is where the whole Andronis story began. Miltiadis Andronis, a Santorini local turned hotelier, first visited the site in 2006 and opened the hotel the following year as a run of villas on the caldera cliff, and twenty years on in 2026 it has grown into the group's flagship, a run of suites and villas connected by what one recent reviewer called a genuine labyrinth of smooth limestone paths and marble terraces cut straight into the rock, each one angled so it still feels private in a village built almost entirely around the view. Mare Sanus, its own small spa, sits inside that same cliff architecture, built around ESPA's treatments and the hotel's own Andronis Essences line.

The verdict

Mare Sanus is a small, confident spa inside a hotel that doesn't do anything by half. Alongside it sits Lycabettus, the group's two Michelin starred restaurant perched over the Aegean, and a wider hotel that has picked up a run of five star travel industry awards over the years. None of that belongs to the spa itself, and Mare Sanus never claims otherwise, but it sets the standard the spa is clearly trying to meet. An independent reviewer who stayed at the hotel in August 2026 wrote that treatments there made a long afternoon pass quickly, which is as good a description as any of what this spa does well. It earns a Silver placing in this guide: a genuinely good, well sourced spa, set inside one of Oia's most storied hotels, and built for a short, well judged visit rather than a day spent inside it.

The water

Water runs through Mare Sanus by name as much as by treatment. Mare Sanus is Latin for healthy sea, and the spa carries that idea straight into ESPA's marine led body work, including a wrap built from algae or marine mud, delivered with the real Aegean sitting far below the hotel's own cliff. It is a literal reading of a sea view: a treatment built from the sea itself, inside a clifftop room cut into the same volcanic rock the caldera is made from, with the hotel's own private plunge pools and cave pools set into guests' terraces just outside, continuing the same idea from suite to spa and back again.

Treatments

The menu centres on the Andronis Rituals, two hour sequences called Energy, Rest and Calm, and Balance, each moving through a foot ritual, a full body scrub or massage, a scalp release and a closing tea ritual. ESPA supplies the wider menu, including its Tri Active facials and its Skin Vision diagnostic lamp, used to read the skin in front of the therapist and tailor the treatment accordingly. Alongside ESPA sit Andronis Essences, the hotel's own oils, distilled from plants grown on an organic farm on Crete. Bamboo Massage and a Holistic Full Body Massage round out the signature list, built with a soft to medium Swedish style pressure, and ESPA's facial menu runs from a quick Express Facial through to a fuller Inner Beauty Facial, each one working from the same Tri Active base formulas. Couples can book the Andronis Rituals, or any treatment on the wider menu, together in one room, and treatments can also be brought to a guest's own suite entirely, for anyone who would rather not leave their own terrace at all that day.

Getting in

Mare Sanus takes bookings through the hotel's own reservations system or by email, and treats guests who are not staying at the hotel the same way: anyone can book a treatment, subject to availability, by contacting spa reception ahead of time. The spa runs daily from ten in the morning to seven in the evening. The hotel does not take children under thirteen at all, a policy that covers the whole property rather than just the spa, and the spa's own current menu sets a separate minimum age of sixteen for treatments themselves. Santorini's own airport is the easiest way in, a drive of around thirty five minutes from the hotel, with Athinios Port a similar distance away for anyone arriving by ferry, and the hotel's concierge can also arrange a private transfer or a helicopter tour for anyone wanting to skip the drive altogether. The hotel itself sits within easy walking distance of Oia's own shops and restaurants, so a treatment can easily sit either side of an evening spent wandering the village on foot.

What to know before you fall in love

Mare Sanus itself is genuinely small: two treatment rooms, reached by a run of steps along the caldera cliff with no lift, and no relaxation lounge to linger in afterward, so the plan is to head back to a private terrace rather than a spa lounge once a treatment ends. The hotel's own materials are not perfectly consistent on how those two rooms are set up for couples, and they disagree with each other, and with independent sources, on the exact number of suites and villas across the wider property, so anyone with a specific room or treatment pairing in mind is best confirming it directly before travelling. The same cliffside setting that gives Andronis its views also means a good number of steps throughout the property, with no lift anywhere, so this is not an easy stay for anyone with mobility needs, and the hotel asks guests in that position to contact its reservations team directly before booking.

Best for

Best for couples staying at Andronis Luxury Suites itself who want a short, well sourced ritual without leaving the hotel; for anyone drawn to ESPA's marine led treatments or the brand's own Cretan grown oils; for a honeymoon or anniversary stay, since the hotel's own setting and service are built around exactly that kind of occasion; and for anyone who wants their spa visit to feel like a quiet extension of their own suite, with the cliff and the sea doing the memorable work.