You could play the Where is Waldo game with pictures around Lake Superior. I'm sure there are folks out there that can guess right away where pictures are taken as they are so educated about lake Superior. These shots were taken in Copper Harbor Michigan on Hunter's Point. Purchased and protected by donations this point of land is a real gem. Yes you can search for rocks. Protected from development it's a nice addition to the Copper Harbor's list of things to do.
Trails go out to the point and you can view Lake Superior to the north and Copper Harbor across the harbor. How long did it take for the waves to wear that concave shape into that very hard rock? I'm guessing the entire 11,000 years since the glaciers melted. Of course the lake level was much higher so waves weren't hitting this rock all that time. But you get the idea. For more information I found this interesting site: