Been to a ton of minor league and spring training facilities for various teams, and obviously my home base at Citizens Bank Park (and of course the fabled Vet). GO PHILLIES!
Other stadiums: Camden Yards (Orioles: my personal favorite stadium next to CBP), Yankee (old and new), Nationals (old and new), Chase Field (D-backs), Coors Field (Rockies), AT&T Park (Giants), Fenway, PNC (Pirates), Tropicana (Rays), O.co Coliseum (A's: former Philadelphia team, woo!), and I will be going to Wrigley over the summer.