Mapparium, Mother Church are Hidden Gems in the Back Bay

Inside the Mary Baker Eddy Library on Massachusetts Avenue sits a vivid, 608-panel glass globe. Called the Mapparium, the 83-year-old globe is 30 feet in diameter and three stories high, according to tour guide Bert Hogan.
The Mapparium opened in 1935, with the expectation that the panels would be updated to keep up with current maps, Hogan said. But that was not the case, as World War II made that impractical to do. None of the panels have ever changed, so the globe reflects the world as it was