The Mary Baker Eddy Library is a cool spot in Boston where you can dive into the world of Christian Science founder Mary Baker Eddy. It's not just a regular library - it's also a museum and home to Eddy's papers. One of the highlights is the Mapparium, a three-story stained-glass globe where you can literally stand in the middle of the world. Plus, they've got a bunch of historic Bibles and an exhibit on Eddy's life and the press coverage she got. If you're into history or just want to explore something unique, this place is worth checking out!