With a new Yankee Stadium, the number of ballparks I've visited that are no longer in use has grown to nine. Those nine are: Candlestick Park, Jack Murphy Stadium, Kingdome, County Stadium, Old Comiskey Park, Yankee Stadium, Olympic Stadium, Old Busch Stadium and Mile High Stadium. Each ballpark has great memories for me, even if the park itself was terrible.
Equally in the negative, the ballparks I never made it to that are no longer in use kind of bothers me. I should have gone to some of these: Exhibition Stadium (Toronto), Memorial Stadium (Baltimore), Municipal Stadium (Cleveland), Arlington Stadium, Atlanta Fulton County Stadium, Tiger Stadium, Astrodome, Three Rivers Stadium, Riverfront Stadium, Veterans Stadium, RFK Stadium, Shea Stadium. The Metrodome will be added to this list next year unless I get a trip to Minnesota somehow. Detroit and Cleveland are the biggest bummers for me.