Ritz-Carlton, Key Biscayne

Hands down, the Ritz-Carlton is Miami's best full-service resort, with tropical gardens, a tennis center, a 20,000-square-foot spa, kids' programs, and a pristine beach. The lobby area and rooms have marble floors and an English country-house look that are designed to suit the corporate imperative. Key Biscayne itself is a one-stop wonderland for kids, with two fantastic wading and play areas—Crandon Park and Bill Baggs State Park—both less than a five-minute stroll away from the hotel, making this an ideal place for families. But the hotel also has great amenities, such as the Cantina Beach restaurant, a sleek affair with a fire pit in the sand and more than 80 kinds of tequila, making it a good choice for romantic getaways. Be warned: the world-unto-itself atmosphere makes it difficult to leave the island and explore the rest of the city.