Kauai, nicknamed The Garden Isle, is Hawaii’s fourth largest and northernmost island with a diverse landscape of mountains, valleys and cliffs. Kauai receives more rain than the other islands of Hawaii and is considered a tropical rainforest. Popular tours in Kauai include the Napali Coast, Wailua Falls, Poipu Beach, and Waimea Canyon. Fun things to do in Kauai include hiking, swimming, surfing, snorkeling, kayaking, golf, luaus and whale watching. Hawaii is beautiful year-round, but their high travel seasons are from December-March and again from June-September, so expect to pay a little more for flights and hotels during these months.