This family-friendly addition to Aventura’s JW Marriott Miami Turnberry Resort & Spa is about the best hotel perk any kid could ask for. Free to guests, and open to the public, Tidal Cove packs in all the water-park essentials—slides, a lazy river, a FlowRider surf simulator and a splash zone for the kiddies. Plus, it boasts two full bars and cabanas for the grown-ups to chill under and sip frozé.
Must ride: The Boomerango for a brief but terrifying moment of near-weightlessness.