Need to know
20, all with sea view.
12 noon. Earliest check-in, 2.30pm. Both are flexible, subject to availability.
Double rooms from $639.68 (€572), excluding tax at 13 per cent.
Rate includes a Mediterranean buffet breakfast with made-to-order omelettes.
The Psychas family, who set about restoring these ancient caves in the Sixties, once traded wine with Odessa; don't leave without sampling a selection of Santorini finest vintages.
November 2015 until 1 May 2016 inclusive.
At the hotel
Spa, steam room, sauna, gym, outdoor Jacuzzi, free WiFi throughout. In rooms: iPod dock, minibar, kettle, Apivita toiletries. One Deluxe Suite and the Perivolas Suite has a private steam room, the New Perivolas Suite has a hammam, and two Deluxe Rooms have a private outdoor Jacuzzi.
Our favourite rooms
The cave-carved rooms are bright and breezy, with whitewashed walls, smooth vaulted ceilings and clever skylights that let in plenty of light. Splashes of fuschia and lilac echo the bougainvillea dotted around the grounds. The Lifestyle Studios make perfect little boltholes: one has big windows looking out to sea and a downstairs bathroom, the other has kept its original bread oven. Suite 15 has a big, secluded outdoor terrace. Two of the Deluxe Suites have their own Jacuzzi. The Perivolas Suite is a true rock-star retreat, with its steam room, indoor hot tub big enough for ten, and a private pool extending out from a cave to a wow-worthy terrace.
The unheated infinity pool is all curves and startling Aegean views – a knockout splash of bright blue against black volcanic rock that's graced the cover of many a magazine. Claim a poolside lounger for front-row seats to Oia's famed sunsets, far from the selfie-loving crowds.
When you tire of watching the graceful ballet of ships across the bay, retreat to the 60sq m spa, carved right into the cliffside. The steam room, sauna, massaging jet showers and outdoor hot tub make short work of travel-weary limbs; for total indulgence, try a holistic massage, detoxing body wrap or sea-lavender-infused facial. There's even a range of anti-fatigue eye masks for the seriously jet-lagged. Luxurious Apivita products are used, and the therapist is in high demand, so it's best to book a week in advance. A super-size gym has everything for your cardio, core-strengthening and weight-training needs. Pilates and yoga sessions are held here too (for an additional charge), and there's a stash of mats and a pilates reformer machine.
Bring a pair of Havaianas: the terraces' black volcanic stone can get hot in the sun.
Bathrooms are stocked with Apivita toiletries, a quintessentially Greek range infused with honey and fragrant herbs grown in organic farms and apiaries.
This is a haven for grown-ups – no under-16s allowed.