This all-inclusive is one of the top kid-friendly resorts in the region, and yes, it's a wonder it all runs as smoothly as it does. Beaches is enormous, and with the addition of the neighboring Veranda resort—now the Key West Village—it got even bigger, boasting something like 769 rooms, stretched along a 75-acre swath of sparkling Grace Bay oceanfront. Each of the four themed "villages"—Caribbean, French, Italian, and Key West—has its own myriad restaurants, decor, and activities. 

Among the child-centric enticements (in addition to 10 pools, Grace Bay, and watersports toys of every stripe), Beaches has a massive waterpark called Pirates Island, with wave pool, waterslides, and a lazy river; "Sesame Street" characters strolling the grounds for photo ops and friendly hugs; a Kids Camp (kids 6–12); Xbox Play Lounge for older kids; and Club Liquid, a teen disco. A full-service nursery is overseen by accredited nannies. Your child's favorite food is here, somewhere, amid the resort's 21 restaurants. To add to the controlled chaos, someone is getting married onsite on an almost daily basis. Tip: Give your kids a memorable finish at day's end with a special Sesame Street bed "tuck-in" by Elmo and Cookie Monster.

Accommodations come in a range of categories and configurations. Higher-category suites are a little more elegant, a little more spacious. Premium rates buy you things like four-posters, bars and refrigerators stocked with customized goodies, and even 24-hour butler service. Tip: You can have all that activity and a little peace and quiet if you stay at the Key West Luxury Village, which has a small-town neighborhood feel, with pastel-hued clapboard houses and attractive furnishings.

"All-inclusive" here includes all meals and drinks, unlimited use of most land and watersports equipment, and, blessedly, gratuities. Scuba courses and other excursions are extra.