2. The Green Monster was once a pile of dirt
From 1912 to 1933, a 10ft incline slope called "Duffy’s Cliff" occupied left field because of some old-timey civil engineering. After a series of unfortunate fires, the 1934 renovations birthed "The Wall," originally blue and still the tallest wall in the majors at 37ft. In 1947, they applied the signature paint to bring the Green Monster to life.
3. Canvas Alley was made for elephants
Canvas Alley, formerly a large gap between the right field grandstands, stretched all the way to Van Ness St and was designed to accommodate circus elephants. (Remember circuses?) Over time, the passageway was built over and significantly narrowed, and it became the crowded game-time home of the grounds crew... who don’t seem to mind.
4. The Sox first adopted the netting that keeps fans from getting drilled
Foul balls injure almost 2,000 fans each year, and that number would be dramatically higher without the home plate foul ball screen, which was first used at Fenway. You’re welcome, baseball fans, for less head trauma and less spilled beer.