"On the southern California coast between San Diego and Carlsbad, the airy Auberge del Mar feels like a world unto itself. It is most famous for its spa, and for good reason—treatments like a rosemary salt scrub, a sea stone massage, and a soothing body wrap utilize fresh local ingredients for a relaxed, back-to-nature vibe. Request an ocean-view room on the second or third floor, have a glass of wine on your private balcony, and then sleep with the windows open."