Price: Adults from $149; kids from $99 Duration ... Take a sail around Oahu, enjoying the sights and stopping at a top snorkeling spot to swim with sea turtles and tropical fish.

Tickets start at $110 per adult and $85 per child ages 5 to 11; kids 4 and younger ... site, snorkel at Tulum's beach alongside colorful fish and stingrays, and swim in two cenotes.