In addition to showing how confusing designs were before Beck’s the site answers many unusual questions about abandoned stations, bomb shelters and the like.
History of London’s Underground
A quick history of the London underground from the official London Transportation website.
Things To Do Around London: A visitor’s guide to exploring the London Underground and its history.
On the map below, the Underground Circle line is laid out along the actual locations of the stops. However on the Tube map, the line appears as a yellow rectangle.
View London Underground in a larger map