For years now there have been outdoor spa-treatment rooms and there have been hotels with tree houses. So why has it taken so long to combine the two? It hardly matters—the Bora Bora Lagoon resort has built a pair of treetop hideouts, tucked high in the branches of massive caoutchouc trees, and the result is sensational. From the second floor of the beachfront spa, a wooden bridge leads to two leaf-sheltered rooms, where therapists administer massages and body buffings using indigenous Polynesian ingredients. Among them are virgin coconut oil, tamanu balm, and ground malachite, which get mixed with sand to create a scrub that is the same blue as the lagoon. As exotic as these potions are, the most refreshing thing about the new facility is the simple, soothing rustle of leaves—it's like wrinkle reduction for the brain. Treatments, $100-$1,400; rooms, $545-$1,120; 800-860-4095; www.boraboralagoon.com.
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