One of Orange County’s most opulent hotels, the St. Regis, a Tuscan-inspired property located midway between Los Angeles and San Diego, is perched above the pristine shores of the Pacific. Guest rooms have plantation shutters, marble bathrooms and spacious balconies, plus super-deluxe linens. At the 30,000-square-foot Spa Gaucin, the couples’ treatment rooms feature fireplaces and Roman tubs. Monarch Beach Golf Links, a 30-year-old layout remodeled in 2012 by Robert Trent Jones Jr., is known for its crushed white marble bunkers and its “Ocean Loop” (holes one through five), which skirt low bluffs near the beach. Stonehill Tavern, Michael Mina’s dinner-only restaurant, is the resort’s top dining spot.