I've never found a point, though I would think that the concentration of historical native activity would be high in my area of the straits of Mackinaw. About the only thing I find that others seem to find interesting is Petoskey stones, which are the fossilized remains of an ancient coral that was concentrated in this area. I find them all the time, including a few minutes ago on a jobsite.

[Linked Image from i.imgur.com]

4 out of 5 Great Lakes prefer Michigan. smile