Miraval (Tucson, AZ) has always been a leader in spa programming, and this October, it's paving the way again with the debut of Vasudhara, an innovative water treatment that ignites the sense of touch as guests don blindfolds and noise-cancelling headphones. Giving new meaning to the idea of water therapy, the treatment incorporates Thai massage and the pulsations of sound from powerful underwater speakers. Here, Simon Marxer, corporate director of Miraval Spas, reveals highlights from the unique sensory experience.