Of the four most popular Hawaiian islands, Kauai is the smallest and least developed, but it still wows with natural wonders like the 10-mile-long Waimea Canyon, towering waterfalls, and gorgeous oceanside rock formations at Queen's Bath and Spouting Horn. And though the beaches on Kauai are rocky and narrow, many of Kauai's beaches are uncrowded or isolated -- ideal for quiet walks, picnics, and picture-perfect views. Take a look at our expert picks for the best beach hotels on Kauai, and get inspired!