Camden Yards and Coors Field are both great ballparks! I also like Safeco Field in Seattle. SkyDome (now Rogers Centre) is also another interesting ballpark as well.

I also made it to the "new" Yankee Stadium this year (I've been to the "old" stadium more times than I can count), and I must say that I like what they did with it!

I also admit loving Fenway Park. I may not like the team that plays there (the Yankees' natural enemies), but I do love their ballpark. If you appreciate history and architecture, you probably would as well.