At this five-month-old boutique retreat in the Selman hotel, located just beyond the Medina, master designer Marrakech devotee Garcia took inspiration from the East. He arranged the hammam-like spa’s seven rooms around a serene, naturally lit square pool and employed carved wooden screens and perforated vaulted ceilings to create an intriguing interplay between darkness, shadow, and light. Garcia combined all of this with artisanal Moroccan brick...