I would highly recommend checking out the open pit iron mine near Ishpeming. We found it a few years ago while driving around in the area. Its hard to find info on it, but if you do a little digging you can find it. You can go on a bus tour starting at the Ishpeming Mining museum. The name of the mine is the Tildon Iron Mine. The mine is active, so when you are on the bus you are surrounded by dump trucks and front end loaders that is MASSIVE next to a bus.