Run by husband-and-wife team Rachel and Don Domingo, this is the best full-service dive operation on the island. Stop in at their South Maui shop, and you might just end up scuba-certified ($299 for a 2-day course). The skilled dive masters and instructors are so fun that they make every aspect of getting geared up to go underwater enjoyable. You don’t need certification for an intro shore dive at Ulua Beach ($99), but you do for a two-tank adventure to Molokini aboard the Maui Diamond II ($159 with gear, $139 without). Captain Don regales his passengers with jokes, snacks, and local trivia. Rachel has a knack for finding camouflaged frogfish on the reef. Even experienced divers will be dazzled by the guided scooter dives ($139–$169). The rideable rockets allow you to zip along the ocean’s floor and visit sunken World War II wrecks, caves, and turtle-cleaning stations.