Concierge.com's insider take:

The Grand Hyatt is easily the most extravagant resort on Kauai's always sunny south shore, with 602 rooms and amenities that make it family-friendly yet elegant enough for a romantic trip for two. The six-story structure harks back to the plantation style of the 1920s, and since it's built on a slope to the sea, it just slides by the island's rule of thumb: No building can be higher than the tallest coconut tree. In 2007, a major renovation gave all of the rooms a much-needed makeover (replacing tropical prints with mod white fabrics and boxy furniture); it also expanded the Anara Spa, adding a beautiful outdoor treatment area, including a completely private couples retreat (massage tables, manicure chairs, outdoor showers, and whirlpool). Because the beach here isn't suitable for swimming, the focus is on elaborate saltwater and freshwater pools with a maze of slides, caves, and waterways. The 50 acres of manicured grounds are ideal for wandering (although it's quite possible to get lost among the sometimes confusing paths). And—best of all—you can send the kids to Camp Hyatt while you make the most of the cocktail lounges, restaurants, shops, rental car desk, and golf course designed by Robert Trent Jones, Jr.—Updated by Cathay Che