Atlantis Submarines. Want to stay dry while exploring the tropical undersea world? Climb aboard the 48-passenger Atlantis X submarine, anchored off Kailua Pier, across from Courtyard King Kamehameha's Kona Beach Hotel. A large glass dome in the bow and 13 viewing ports on each side allow clear views of the aquatic world more than 100 feet down. This is a great trip for kids and nonswimmers. 75-5669 Alii Dr., Kailua-Kona, Hawaii, 96740. 808/326–7939; 800/381–0237; www.atlantisadventures.com. $119.