Koh Samui Ultra-Luxury — The Finest Five-Star Stays

On Samui, the summit of the market is a staffed hillside estate rather than a hotel room: several bedroom pavilions arranged around an infinity pool, a house manager, a private chef cooking southern Thai dishes to order, and in some cases a stretch of beach reached by your own path. Arrivals can be arranged by private aircraft into the island's small airport, and a crewed yacht turns Ang Thong's empty coves into a personal itinerary.