"Cygnett has taken a small portion of London’s Tube, specifically central London, and put it on the back of an iPhone 4/4S case. For visitors to London, it’s a great replacement for those nefarious pocket maps. This case will especially come in handy if you are making your way to London-town for the 2012 Summer Olympics."

Source: http://www.chipchick.com/2012/05/london-2012-olympics-tubemap.html

Tags: London Underground TubeMap iPhone 4S Official Transport for cases Chip Chick