The Napali Coast is one of the world's most beautiful places. I was so struck by the beauty of the green mountains rising out of the sea, and the dolphins swimming right under our boat, and the humpback whales too numerous to count that I forgot to take a photo of any of it. But the water is pretty too. There are many boat tours you can do, and I'm sure they're good. We went with Liko Kauai Cruises and thought it was great. The boat's a little smaller so it can get closer to the sea caves, and they leave from farther north so they can get farther. Our guides were good--though not natives, as the website hints they might be. It was an unforgettable day.