This five-star, all-inclusive retreat attracts the A-list (Edward Norton and Donna Karan have visited) with its stunning perch by the Koro Sea and a spa that sets the dial to dazzle. The sprawling Valeni Sasauni Spa Sanctuary has treatment rooms with water views, while others are hidden within the tropical landscape. Yet the highlight is the state-of-the-art hydrotherapy room with an aromatherapy area, hot and cold pools, a sauna and the irresistible pull of a waterfall massage.