High in the Costa Rican hills, a short drive from the surf mecca of Dominical, sits the new Lamangata estate. The 12,000-square-foot villa has six ocean-facing suites, a teakwood yoga studio, a spa, an infinity pool with an Olympic-size swim lane, and even a grove of fruit trees to supply its kitchens. This oversize, over-the-top property—yours for $80,000 (Php 4.7 million) a week—is emblematic of a growing travel trend: the supervilla. These lavish lodges are larger and more amenity-rich than a typical luxury vacation rental but smaller than a boutique hotel. “It’s your own resort that you never have to leave,” says Jason Squatriglia, a Robb Report Travel Master. “You don’t have to venture out if you don’t want to.” The emergence of this category is driven by a newfound focus on “celebration travel”: trips organized for milestone birthdays, family reunions, and the like. Accordingly, most supervillas have at least..