5. See the world
The Mapparium at the Mary Baker Eddy library is a short walk from the Prudential Center in Back Bay. A 30-foot glass bridge takes visitors into the middle of a giant glass globe, giving them a view of the world inside-out. Built in 1935, the Mapparium has hosted more than 10 million visitors.
General Admission $6; Seniors, students with ID; children 6-17 $4; children under 6 free.