One&Only Spa - Mandarina

Treehouse villas perched in 200-year-old rainforest trees, ground-level villas threaded through tropical undergrowth, and a palm-fringed stretch of Riviera Nayarit coastline that somehow still feels undiscovered. This Forbes Four Star resort on the Vogue 100 Best Spas list makes a feature of the temazcal, a pre-Hispanic sweat ceremony that predates the wellness industry by several centuries. Eighty acres, a private plunge pool, and a dedicated host who handles the details you didn't know you needed handled.