Water is an essential element at THEhotel at Mandalay Bay’s Bathhouse (877.632.9636, www.thehotelatmandalaybay.com), a stark yet elegant spa that opened at the Las Vegas resort in March 2004. Designed by New York architectural firm Richardson Sadeki, the spa features scented steam showers, whirlpool baths, plunge pools, and textured black slate walls over which water trickles from the ceiling. A rain forest soundtrack resonates from the audio system.
Upon arrival, guests complete a questionnaire covering health issues from allergies to anxieties. The spa uses the responses to create aromatic formulas for custom Aromapothecary collections that range from exfoliants and bath salts to body lotions and massage oils.