While it's impossible to experience all Hawaii has to offer in just a weekend, if you can only spare a few days, hit up the island of Kauai. If you're trying to escape dreary winter weather, the Garden Isle will reinvigorate your spirits with its greenery and sunshine. Kauai is famous for its lush valleys and stunning natural sights. Visit Polihale Beach, one of the best secret beaches in the world, and explore the famous Na Pali Coast and Waimea Canyon, known as the Grand Canyon of the Pacific, either on foot, by car or from above via a helicopter tour. Winter is when humpback whales can be seen migrating through the waters all around the island. The warm waters are also great for swimming, and winter brings nice swells for surfers.