Tulum may be known for beautiful beaches and trendy hotels, but it can also be a surprisingly fun place to visit with kids. There is much more to do here than spend the day sitting by the water. A family trip to Tulum can include climbing down into a cenote for a swim, exploring ancient Maya ruins overlooking the Caribbean, snorkeling in clear water, visiting an eco-park, and, of course, spending plenty of time at the beach. Tulum with kids does require a little more planning than staying at a big all-inclusive resort. Things are spread out, the heat...