Owned and operated by De Palm Tours, one of Aruba’s biggest tour operators, De Palm is a private island that packs several adventures into one sandy islet just a seven-minute ferry ride off the coast of Aruba. Admission includes swimming, snorkeling and splashing down the water slides. For additional fees, you can try SeaTrek or Snuba, varieties of underwater viewing that don’t require formal scuba training. Some families like the one-stop setting that offers several activities; others won’t, since the island can be crowded — especially when cruise ships are in port.