The one's I've been to are...
Comiskey Park (RIP)
Wrigley Field
Milwaukee County Stadium
US Cellular Field/New Comiskey
Veterans Stadium
Oriole Park at Camden Yards
Busch Stadium (Old)
Miller Park
Tropicana Field
Citi Field (I forgot I went to this one in 2013, this is the last new one I checked out)
I went to the Giants and A's Spring Training parks back in the 90s. I should feel bad that I haven't been to any Spring Training games here in Florida, but as I said, I don't know any baseball fans here, and the White Sox are really the only team I'll bother to go see play on my own.