Photos of Kauai need no filter — nature’s got amazing palettes all ready for you. Hawaii’s oldest, greenest, and most dramatic island, Kauai offers visitors a chance to explore rainforests and play in the surf. On your Carnival cruise to Kauai, Hawaii, get a helicopter’s-eye view of the inaccessible parts of the island… or get up close with a tour of Waimea Canyon or the Na Pali Coast. (Or just relax on the island’s incredible beaches on your Kauai cruise.)