1. Oahu: Waikiki Undersea Adventure Submarine Tour
Climb aboard Atlantis XIV, the world's largest hi-tech passenger submarine which holds a whopping 64 passengers—that's 16 more people compared to the smaller 48-passenger submarines. Dive 100 feet below the surface and experience Waikiki’s marine mysteries. Being in a submarine and descending to 100 feet underwater is an adventure in itself. Also get to see real marine life up close. The Atlantis Waikiki dive site is home to many Hawaiian fishes, coral, and turtles. Known for its quality and safety, Atlantis is an eye-opening experience that takes you beyond the classroom as you learn about coral, reef life, and submersibles while visiting sunken shipwrecks, airplanes, and other artificial reefs. Atlantis has a spacious air-conditioned interior, large viewports, and comfortable seating. The hi-tech 64-passenger large submarine offers an enhanced amount of personal space and viewports.