Baseball stadiums are unique in sports thanks to their varying dimensions and beautiful architectural designs. Indeed, it is not uncommon for people to take summer treks just to see all the great parks across the United States. But if you don't have time to see all thirty parks, you must make sure to see at least the nine listed below:

Wrigley Field:
Wrigley Field has been the home of the Chicago Cubs since 1916. Best known for its ivy-covered outfield walls, the Friendly Confines is one of the most historic parks in all of baseball.

Fenway Park:
Home of the Boston Red Sox, Fenway Park is perhaps the only stadium in baseball that can rival Wrigley in terms of historical significance. Fenway is dominated by its huge outfield wall in left field, popularly known as the Green Monster.

Oriole Park at Camden Yards:
Camden Yards ushered in a new era of stadium design with its more retro look that became very popular with fans. Grab a Boog's barbeque and take in the sights of downtown Baltimore while the Orioles take the field.

Busch Stadium:
Home of some of the best fans in all of baseball, Busch Stadium is the park of the St. Louis Cardinals. A newer stadium opened in 2006, Busch Stadium has a great view of the iconic Gateway Arch.

Yankee Stadium:
Although it doesn't have the historic significance of the old Yankee Stadium, new Yankee Stadium is a veritable baseball shrine. With a cost of over $1 billion, Yankee Stadium has all the modern amenities for a baseball fan looking to watch baseball's most famous franchise.

AT&T Park:
Another modern stadium with a look of an older park, AT&T Park is the home of the San Francisco Giants. AT&T Park is home of one of the great thrills in baseball: watching a home run ball sail into McCovey Cove.

PNC Park:
Although the Pittsburgh Pirates have defined futility is recent years, they do have a beautiful ballpark with a fantastic view of the three rivers. In addition to the view, PNC Park has some of the best food and beer selections in all of baseball.

Coors Field:
If you like home runs, Coors Field is the place for you. Located in Denver, the thin air of the Mile High city creates the perfect conditions for a barrage of long balls.

PETCO Park:
In dimensions, the cavernous confines of the Padres' home park is a pitcher's dream. And for the fan who likes to have some fun after a game, the Gaslamp Quarter is one of the most fun downtown areas in the United States.