Swell Maps!

Jo bought me the wonderful 'Metro Maps of the World' by Mark Ovenden for my birthday (the author has a website for the book but it is a dreadful piece of design - unlike the book itself). The book covers metros from 200 cities, only six of which I've experienced:

1. London (of course!)
2. Paris
   
3. Madrid
4. New York
5. Barcelona
6. St Petersburg

Gosh, so many tubes and so little time to travel in. Nizhny Novgorod here I come!