8. Deer Lake, Minnesota
Minnesota may be called the “Land of 10,000 Lakes,” but Deer Lake is something out of a picture book. The mineral content of the water, along with the absurd clarity that allows you to see nearly 15 feet deep in some places, is just the beginning of why Deer Lake astounds. It is also called the “Lake of Changing Colors,” because sometimes it looks blue or green. You can enjoy swimming, canoeing, or boating around the area, too.