As spas have evolved over the past decades, I have become increasingly curious about those with medical offerings, so I recently traveled to the Riviera Maya to visit SHA Mexico, the first international outpost of the celebrated Spanish wellness clinic and arguably the most medically advanced spa in North America. A 40-minute drive from the Cancun airport, SHA is a sleek 10-story tower on a quiet stretch of beach facing Isla Mujeres. Read my full report on the property here—and get 10 wellness a...