For those who have HD television and get the INHD channel, there is a series on baseball parks that is currently airing called Cathedrals of the Game. Each half hour episode features a detailed tour of a current MLB park as well as a look back at the history of baseball in the respective city. A look at their website indicates that episodes have been made for 14 different parks as well as one about the Baseball Hall of Fame in Cooperstown.
The shows are produced in conjunction with MLB which allows for an "all-access" pass to the ballpark including a look inside the clubhouses and other areas that the average fan would never see. Unfortunately the host, Michelle Beadle, is basically just a pretty face and has a limited knowledge of baseball so can't get much out of the interviews she conducts with team personnel and players. Despite this, the shows are definitely worth watching, if for nothing else the stunning photography that comes across with high definition. And though the content is geared towards the casual fan, even the hardcore ballpark fans might learn a thing or two that they didn't already know. Catch the episodes while you can as it's doubtful they will be airing after October.