I'm not sure if it counts as a "museum", but the Phipps Conservatory in Pittsburgh, PA is fantastic. I went during COVID and unfortunately wasn't able to remove my mask to smell the flowers, but even then it was stunning.
The science museum of Minnesota in Minneapolis is also a great time. There were a ton of hands on exhibits that were super interesting. The tornado simulator was a lot of fun.
Tacoma Glass Museum is short but a stunner. I've been to this one and the glass gardens in Seattle and I think the Tacoma museum wins by a decent margin. Plus there's live demonstrations where you can watch from any angle. Very cool.