16. Cheney Stadium
Another ancient (by relative standards) Triple A stadium, Cheney was literally cobbled together in 42 days in 1960 to lure the Giants' Triple A affiliate from Phoenix. It still features wooden grandstands seats taken from Seals Stadium in San Francisco, as well as towering light stanchions that recall a bygone era of ballparks. Cheney might not have all the amenities of the newer Triple A parks, but you're in Washington in summer, where the bleachers are more pleasant than any luxury suite back East.