I collect transit cards from all the places I visit, and I just filled up my first display case! Looking forward to the next 20; what transit systems do you think I should try next?
EDIT: the transit agencies on display:
Luleå, Sweden (card missing, I didn't know at the time that I would want to collect them)
Stockholm, Sweden
Go-to card, Twin Cities of Minnesota
Ventra card, Chicago, Illinois
Breeze card, Atlanta, Georgia
Smartrip card, Washington DC
Orca card, Seattle, Washington
Hop fastpass, Portland, Oregon
Cedar Rapids, Iowa
Eau Claire, Wisconsin
La Crosse, Wisconsin
COTA, Columbus, Ohio
mykey, Indianapolis, Indiana
Citibus, Davenport, Iowa
Winona, Minnesota
Corpus Christi, Texas
Smart Ride, St Cloud, Minnesota
Paul Bunyan Transit, Bemidji, Minnesota
Tri-CAP, rural central Minnesota
Rainbow Rider, rural western Minnesota
Feel free to steal the idea!