SUBSCRIBE: - Exotic Rose Garden at Regents Park, London. Vic Stefanu, vstefanu@yahoo.com. London is a leading global city in the arts, commerce, education, entertainment, fashion, finance, healthcare, media, professional services, research and development, tourism, and transport. It is one of the worlds leading financial centres and has the fifth-or sixth-largest metropolitan area GDP in the world. London is a world cultural capital. It is the worlds most-visited city as measured by international arrivals and has the worlds largest city airport system measured by passenger traffic.