San Ysidro Ranch is one of the most exclusive, romantic luxury options in not just California, but the entire country. The grounds are stunningly beautiful, with mountain views, fresh air and a secluded location in a well-heeled neighborhood. The cottage-style units are individually furnished with brick fireplaces, stone walls, and four-poster canopy beds (some with private Jacuzzis and outdoor showers). Most units have dazzlingly white tiled bathrooms with walk-in showers and large soaking tubs. The rustic, romantic ambiance has attracted everyone from JFK and Jackie to Gwyneth Paltrow and Chris Martin. Some guests argue the experience doesn't justify the high price tags, but for honeymooners or couples, it's undeniably a first-class option.