Location: Miami, Florida
You may notice an architectural trend on this list. Populous is responsible for a large amount of arenas around the world (including London's Olympic stadium. The firm's work for Miami's new Marlins Park is one of the most contemporary designs in Major League Baseball. The idea is to tie the team to Miami's rising position as an international art capital. In that, Marlins Park rejects the retro inspiration of ballparks that have opened in the past 20 years and blazes a new course.