Finally adding some new ballparks!  I am tentatively planning to take a quick trip with a friend, with not much time for other stuff, but we plan to catch these games this summer: 

7/1 1:05 Yankees at Orioles

7/2 12:05 PM Padres at Phillies

7/3 6:05 PM Astros at Nationals

These will be new stadiums for me.  I've been to the old Memorial stadium (Baltimore) several times when I lived in the DC area, 1986-1990,  but that was before Camden Yards, and there was no team in DC!