[john70t]

Near Detroit's ford museum/greenfield village, there is https://www.thehenryford.org/visit/ford-rouge-factory-tour/highlights/assembly-plant-tour/

Out west, near Kalamazoo is Gilmore Car Museum, Hickory Corners, West Michigan 200 vintage cars.
There are a few great wineries as well.

Misc guides:
50 Fun Things to do in Michigan This Summer
https://www.tripadvisor.com/Attractions-g28943-Activities-Michigan.html
Michigan Festivals and Events AssociationMFEA | Party @ MI Place!
West Michigan Guides - Things to Do in West Michigan