Blue Hawaiian has been the Cadillac of helicopter tour companies on Maui and the Big Island for more than a decade, and recently they have expanded their operations to Kauai. I strongly recommend that you try to book with them first. Their operation is first-class, and they use state-of-the-art equipment: American Eurocopter ECO-Star, which reduces noise in the helicopter by 50% and allows 23% more interior room. Plus the craft has individual Business Class-style seats, two-way communication with the pilot, and expansive glass for incredible views. The 55-minute flights journey first to Hanapepe Valley, then continue on to Mana Waiapuna, commonly referred to as "Jurassic Park Falls." Next it's up the Olokele Canyon, then on to the Waimea Canyon, the famed "Grand Canyon of the Pacific." Most of the flight will continue along the Na Pali Coast, before heading out to the Bali Hai Cliffs, and the pristine blue waters of Hanalei Bay and the Princeville Resort area. If the weather gods are on your side, then you'll get to see the highest point on Kauai: Mount Waialeale, the wettest spot on Earth, with an average rainfall of 450 to 500 inches annually. Your flight will take you right into the center of the crater with its 5,000-foot walls towering above and its 3,000-foot waterfalls surrounding you -- something you will remember forever.