Take me out to the ballpark. The crack of the bat. The cries of the peanut vendor. The incredible engineering? To those who consider baseball a religion, the stadium is the temple at which they worship. But the modern park is also a marvel of design and construction. This episode traces the development of the old ballpark from the days of sandlots and bleachers to the retro stadiums with up-to-the-minute features that are bringing fans back to the game. Visit some of baseball's greatest shrines, including Wrigley Field, Yankee Stadium and Camden Yards, and see how the years have changed the way they were conceived and built. Get a behind-the-scenes look at how they work and tour areas off-limits to the public. Hear from the men who built them and play in them, and get an early glimpse of what the 21st stadium may look like.