Opening collage (bottom to top):Sultan Ibrahim Building, Johor, Malaysia, by Bernard Spragg via Flickr (CC0 1.0);Singapore, by Neils de Vries via Flickr (CC BY 2.0);Bellericay High Street, by Steve Hancocks via Flickr (CC BY 2.0);Picadilly Circus, by mrgarethm via Flickr (CC BY-SA...