The mapparium itself is totally awesome. Very colorful and eye-catching. At the time it was built, it was very difficult to put all different colors on a piece of glass...so...truly appreciate the intelligence of human beings. The audio presentation is also touching, enabling the audience to feel the magnificence of history. The rest on the library is ok, giving detailed exhibition of Mary Baker Eddy's life. The Church nearby is beautiful architecture, but I didn't have time to go in. The tour is not long, and $4 with student id is a good deal.