The history of music shown by the London Underground
I have serious difficulties with the selection of music to be mapped, but that should not diminish your enjoyment of this map if you find it more to your taste.
Great technique if somewhat lacking in content. 😉
It does illustrate the point that every map is from a point of view, even if it is an incorrect one (IMHO).
I first saw this in a tweet by The O.C.R.