Shibuya Station, Tokyo: Every day, dusk gives way to a riot of color lighting up whole façades of high-rise buildings filled with department stores, funky boutiques, hair salons, noodle shops, theme-dècor bars, and restaurants. School kids, young adults, and plain-suited "salary men" (office workers) spill out of trains and buses, meet up with friends and fan out into the urban playground of the Japanese capital. For sheer urban energy, there is nothing like Shibuya anywhere in the world.