Metros you've been on swiped from ijk
Got at b3co.com!
I'm disappointed that Portland (our train goes underground near the Zoo) and Seattle's Monorail/transit system aren't on there. I also can't remember from my long ago trip to Germany and Austria when I was 12 what I might have ridden on then... so this isn't the most accurate list. I did find it cool that the three of the cities I've been to in the former USSR are on there!