Oahu is the Hawaiian island that has it all—untouched tropical landscapes as well as a stimulating urban vibe. You can explore the beaches and gentle waves of Kailua, or take in nightlife in buzzing Honolulu (the state's capital), home to a vibrant Chinatown and burgeoning arts scene. Life is still appealingly slow-paced on the northern and eastern shores, where razor-edged mountains descend to spectacular beaches. A thriving traditional culture, plus top-notch historic sites such as the royal Iolani Palace and Pearl Harbor, spice up the mix here as well.