The ivy-clad outfield wall is probably the most iconic element of this Chicago cathedral to baseball, but it's not until the 7th inning stretch when everyone sings "Take Me Out to the Ballgame" (a tradition begun by Harry Caray in 1978) that the magic happens. You'll feel this weird tingling in your blue jeans, you'll sit back and sip that Budweiser, flag down the peanut guy and you'll realize that this is baseball, kids.