Set in a stylish compound, this spa's cool white exterior gives way to 15 treatment rooms decorated in a Thai Lanna style. The King of Oasis is best suited to men and features a two-hour hot Thai herbal muscle compress and a hot oil massage. Ladies can opt for the two-hour Queen of Oasis, which blends Swedish and aromatherapy massages. They also have other a la carte and package treatments for hair, body and face.