The Riviera Maya solved the family-beach problem before most destinations admitted there was one. The Caribbean here is bathwater-warm and stays shallow a long way out, so Playa Maroma and the quieter Xpu-Ha let small children wade while the snorkelers in the family drift over reef, and at Akumal they can do it alongside sea turtles that treat the swimmers as scenery. Inland, the limestone opens into cenotes, the freshwater sinkholes at Gran Cenote and Dos Ojos where the water runs so clear that floating feels like hovering. It is the kind of place where a child's first real swim and an adult's best dive can happen the same afternoon, twenty minutes apart.

What keeps it from being just another beach is the history stacked behind it. Tulum perches its ruins on a cliff over the sea, Cobá lets you climb a jungle pyramid, and Chichén Itzá rewards a longer day trip with one of the New Seven Wonders, all of it landing better with kids than any classroom. The eco-parks, Xcaret, Xel-Há, and Xplor, package the adventure into one gated, zip-lined, underground-river day so parents can stop planning. The resorts are the region's real specialty: all-inclusive properties with serious kids' clubs and water parks built so the grown-ups can slip off to a spa or a quiet stretch of sand knowing the children are not just minded but genuinely entertained. Add tacos that even picky eaters surrender to, and the week mostly runs itself.