This international selection of urban rooftops catalogs a new urban dimension. Through over 50 bars, restaurants, temporary art installations, and gardens, it testifies to the variety of intelligent and exuberant designs that grace city summits from Sydney to Hong Kong, Oslo to Chicago. Whether it’s the panoramic views, the exposure to the elements, or a slight giddiness that comes with height, we see just how the roof has nurtured not only architectural invention but a whole new facet and thrill to city living.