Shorpy has just posted historical photos of a number of places in Michigan.

The railferry Detroit circa 1905:
http://www.shorpy.com/node/8513

The Olds factory in Lansing circa 1908:
http://www.shorpy.com/node/8514

The Great Lakes Engineering Works in Ecorse circa 1906:
http://www.shorpy.com/node/8516

As always, click on the pictures to enlarge them into the big beautiful detailed prints they really are.