Song Saa Resort, Cambodia
"Treatment villas and other places of tranquillity" are spread around the resort, rather than being housed in a central spa building. The resort's head of wellness' will help you create a tailored programme of treatments.Other activities available include yoga, hiking in the rainforest, or gardening workshops.
From £795 a night for a one-bedroom jungle villa (Songsaa.com).
North Island, Seychelles
They are decorated in a style described as "haute couture Robinson Crusoe" by one of the co-architects.
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"It fuses polished... teak, pine, rosewood and ylang-ylang, thatched roofs, rough granite and a lot of large pebbles though the villas are not soeco as to eschew air-conditioning."
From £2,000 per person per night,all-inclusive (www.north-island.com).
Hell Bay, Bryher
The island itself is a "living paean to an England that probably never existed wander its lanes and you'll find hedgerows abundant with wild flowers and the odd honesty box, where a pound will get you a punnet of home-grown strawberries".
Rooms from £135 including dinner (www.hellbay.co.uk).
Lake Mlaren, Sweden
There are just four buildings, including a "light, airy" three-bedroom house and a sauna, says Cond Nast Traveller.
The price includes the use of a small boat to get you to and from the mainland.
It costs from £5,700 for the minimum stay of two weeks (Grandtripsweden.com).
Laucala Island, Fiji
So, the island boasts a golf course, the biggest swimming pool in the South Pacific and nine water craft, "ranging from three jet-skis to a game-fishing pleasure cruiser". There are just 25 villas, "each with its own pool, dotted around its two and a half miles of coast", served by 329 staff.
From £2,995 a night (Laucala.com).
Six Senses, Laamu
"Short of an actual shipwrecking, this is island life at its most isolated at night, the only sound is the sea, lapping gently at your jetty." You arrive by speedboat at your own villa, the best of which "straddle the sea".
The "sun-bleached timber structures" are simple yet grand, "with white curtains billowing around huge picture windows".
From £445 (Sixsenses.com).
