 For instance, the second Yankee Stadium, built 2009, used the same dimensions as the original Yankee Stadium.The heights of the fences can also vary greatly, the most famous example being the -high Green Monster in Fenway Park's left field.Such tall fences are often used to stop easy home runs in a section of the ballpark where the distances from home are shorter, or where there is little space between the field and the street beyond.