Without Atlanta legend John Portman, you might never walk into a hotel lobby with a cavernous atrium, an office tower with stacked balconies or a shopping center with transparent elevators whizzing up and down. Portman revolutionized architecture, turning buildings inward to jaw-dropping effect. To quote his close friend, Ambassador Andrew Young, "Everybody became a country bumpkin when they walked into the Hyatt. You had to say, 'Oh my god, what is this? '"