Kauaʻi, known as the “Garden Isle,” is the easternmost and geographically oldest of the main Hawaiʻian islands. Formed by the volcanoes Kaiwaikini and Mount Waialeale about 5 million years ago, half of Kauaʻi’s coastline has eroded into gorgeous sandy beaches. Highlights include the 25 miles of Na Pali coast with 4,000-foot dramatic sea cliffs and the Alaka’i swamp with an average of 37.5 feet of rain per year, making it one of the wettest places on the planet. If we missed your favorite let us know. Photo: HTA Ben Ono