Located in a building dating to the 1893 Columbia Exposition, the Museum of Science and Industry is the largest science museum in the United States. Our Architectural Master Plan included designs for underground parking to restore the former parklike setting, an underground entrance lobby linking the garage and the main building, an expanded Henry Crown Space Center, and a future 110,000 sq.ft. addition for educational facilities. The underground parking and lobby connector have been completed.
http://www.msichicago.org/
printable project page (pdf file)