The things I learn about through Michigan in Pictures! About Elmo’s Tower on the Keweenaw Peninsula David writes:
I was amazed to find that I’ve never posted a photo of Elmo’s Tower. This tower was built — by hand! — by the late Elmo Negro, at a beautiful rock outcrop along the Cliffs. It’s just above the Phoenix mine, and overlooks the Eagle River gap. The tower has no function other than to be a pleasant place to enjoy a day (and have a barbecue).
More about Elmo (who was apparently a great dancer too) at Pasty Central.