During weeklong retreats at the 8,000-square-foot spa at Anantara Si Kao guests focus on treatments and yoga, and relax on white-sand beaches just south of Krabi.
Set high above Victoria Harbour, Bliss Spa at W Hong Kong offers a respite from the city’s hectic pace. Nine treatment rooms boast the latest modern conveniences (digital lockers; glass-tiled steam showers).
The Spa at the Mandarin Oriental, Sanya is devoted to preserving local techniques, such as traditional herbal bath soaks.
True to its name—which means “peace” in Malay—the Damai at Grand Hyatt Singapore has 11 spa rooms that look onto quiet terraces.
View our full list of the World’s Best Spas 2009.