Google Doodle for London Underground’s 150th Anniversary

Google has replaced their normal logo with a special “Doodle” for today, celebrating the 150th Anniversary of the London Underground today. The graphic is a stylised version of the iconic tube map, with the lines warped to form the letters (and colours) of the normal Google logo, but retaining much of the topological structure of the London tube network.

You can see it (today only!) on the Google homepage. It appears on google.co.uk and google.com.