Waikiki, Oahu, HI
No beach anywhere is so widely known or so universally sought after as this narrow, 11/2-mile-long crescent of imported sand (from Molokai) at the foot of a string of high-rise hotels. Home to the world's longest-running beach party, Waikiki attracts nearly five million visitors a year from every corner of the planet. First-timers are always amazed to discover how small Waikiki Beach actually is, but there's always a place for them under the tropical sun here.