Travel and Leisure: Joshua Bernstein, writing for Travel and Leisure magazine, profiles some of the world’s most visionary cities. From Seoul’s planned Nam June Paik Media Bridge—with gardens, a library, museum, and stores—to Cleveland’s shopping-mall greenhouse, which grows vegetables for the weekly farmers’ market, some cities are taking unique approaches to redefine how they function. Because traffic is one of the biggest and most visible issues plaguing cities, Hangzhou, China, has implemented a novel bike-share program, and Curitiba, Brazil, has developed a rapid transit bus system that rivals a subway for speed and efficiency.