8: PNC Park (Pittsburgh Pirates)
Just an absolute beauty. The Pittsburgh skyline is in the background, with the Clemente Bridge and Allegheny River beyond right field. Everything about this ballpark is just perfect. The Pirates even limited the capacity so as not to play in front of a ton of empty seats.
PNC has hosted one All-Star Game and hosted the first playoff baseball game in Pittsburgh since 1993. It has also seen a no-hitter, and should see more postseason games for years to come.