Absolute Sanctuary, Koh SamuiWhat an absolute bargain. It’s hard to think of another tropical spa – even in Thailand, where reasonable rates are more often than not the rule – that offers quite so much for comparatively so little. Being inland is perhaps a bit of a drawback, but morning hikes to the beach and an afternoon shuttle bus there compensate. Healing Holidays (healingholidays.com; +44 20 7843 3592) can arrange a seven-night Yoga programme from £1,749 per person sharing, including British Airways flights, transfers, full board accommodation and inclusions of the Yoga programme. Healing Holidays Exclusive Offer: For every seven-or eight-night programme booked, receive two extra nights with breakfast.