This post is primarily for international readers. The shapes of baseball playing fields are not precisely defined, unlike almost all other sports. That's one of its charms. The infield, where the bases are, is always exactly the same. However, the broad outfield can be just about any shape or dimensions.
Most places are close to regular, like Busch Stadium in St. Louis. Some have odd features. Houston has a little hill straight in the back. But century-old Fenway Park is the most bizarre. It was squeezed into the narrow, irregular streets of Boston. Most places have seats around the edge of the outfield. Fenway's left field has a wall 37 feet / 11.3 meters tall, known as the Green Monster. To hit a home run, a batter must not only hit the ball far but loft it high to clear the Monster. Balls hit off the wall carrom at wild angles.
