Four Seasons Resort Koh Samui is, as Thai island escapes go, perhaps as good as it gets without owning an island outright. It’s set on a lush hillside cascading down to a private, white-sand beach; that means every single room enjoys a sea breeze, a sea view, and a straight-to-beach relaxation protocol. Between snorkeling and rainforest spa sessions, it’s best enjoyed outdoors and barefoot, but it’s also good to know that the Four Seasons formula holds up in the rooms: fresh tropical fruit, flowers, rosewood, and high ceilings. Oh, and to gild the lily, each villa has a private infinity pool.