Can't decide whether to head for the big city or the beach? Get the best of both worlds in Miami, Chicago, and other far-flung destinations where skyscrapers and hot pavement give way to patches of sand and beautiful people. These 10 great urban beaches range from the iconic to the up-and-coming. Read on to find out which two cities barged in heaps of sand this year to create new beaches in places you'd never imagined.