My travels in London after four, and also eleven years, geographically summarized. Each blob is a tube station. A station is red if I can’t remember ever having entered or exited there, yellow if I can only think of one occasion, and green if I think I have been there several times.
I’ve been to a lot of new bits of London in the seven intervening years. Doing the London Loop I picked up a bunch of the stations at the ends of lines. But I have still never taken the tube to Ruislip, Harrow, or West Ham (despite now living near Stratford… because passing through doesn’t count)
The blob sizes (and exact colours) are irrelevant.