With 2,000+ exhibits across 400,000 square feet in 75 major halls, Chicago’s Museum of Science and Industry is the largest science museum in the United States. The MSI has both significant permanent exhibits and ever-changing traveling exhibits, located in an architectural masterpiece overlooking a lagoon.

Among the top things to see are a 40-foot tornado machine, the world’s largest LEGO display, a full-size coal mine replica, and German submarine from WWII