6. Maui Ocean Center.
If you find yourself facing a rainy day on the island, consider spending some time at the Maui Ocean Center. The vast Maui Ocean Center offers a variety of ways to get up close and personal with the island’s nautical residents, including touch pools and a tunnel beneath the 750,000-gallon Open Ocean exhibit (which houses more than 2,000 fish). While here, you can catch a glimpse of everything from stingrays to sea turtles to sharks.