fleetfootmike mentioned his quest to visit all 30 Major League Baseball parks. This caused me to count on my fingers to figure out how many parks I'd been in.That would be twenty two, if I've not forgotten any.
Boston: Fenway Park
Baltimore: Camden Yards
Montreal: Olympic Stadium
Toronto: The Skydome
Cleveland: Jacobs Field (but no game, as it was delayed by rain until we had to leave)
Detroit: Tiger Stadium
Milwaukee: County Stadium, Miller Park
Minneapolis: The Metrodome
Chicago: Wrigley Field, Comiskey Park, U.S. Cellular Field (yuk!)
St. Louis: Busch Stadium I, Busch Stadium II
Denver: Coors Field
Arlington: The Ballpark at Arlington
Phoenix: Bank One Ballpark
Los Angeles: Dodger Stadium, Anaheim Stadium
San Francisco: Pacific Bell Park, The Coliseum
Seattle: The Kingdome
I would have picked up PNC Park in Pittsburgh in 2001, but work asked very nicely for me to take fewer vacation days across Worldcon, so we punted those tickets. The company paid for them, at least, as well as airfare and shipping of product to the Dealers' Room at MilPhil.