As the oldest active stadium in Major League Baseball, the Boston Red Sox’ Fenway Park has many interesting features and quirks, the biggest of which is in the outfield. The 37-foot tall left field wall, known as “The Green Monster”, is quite the spectacle for fans and players alike.

Designed to offset its closer than normal distance from home plate, the Green Monster is a product of its environment: Fenway Park is crammed into a dense urban neighborhood with a limited footprint. Not only does it have the Green Monster in left field but it’s got a shorter right field wall than any other park in Major League Baseball at 295 feet.