Harry Beck drew this iconic 1933 London Underground map, based on his experience with electrical circuit diagrams:

Really beautiful. Instantly recognizable. Legible. And there’s the Thames for reference; but that’s the only geographical feature. (Another view of the same map.)
The current London Underground map (.pdf) encodes a lot more information, not as beautifully as Harry’s I think.
More on Harry Beck.
[Related: NYC Subway Porn]
Do you know how hard it is to get a London Underground map off the net. Thanks :)
Thanks. I’ve had trouble finding a picture of the london underground in that high of a resolution.