The Cramer Tunnel, about 78 miles north of Duluth is the largest railroad tunnel in Minnesota measuring about 1,800 feet and has been abandoned since 2008.
The NorthShore Cove is a modern Airbnb with mind-blowing views of Lake Superior. It's serene and peaceful and perfect for some star-gazing off of your very own private beach.
If you're not a big camper, but would like to be. You've got to check out this glorified 'tent dome' in Tofte, MN. This Airbnb offers great privacy and beautiful sights.