Isle Royale National Park, Michigan
If you're like many Americans, you've probably never heard of Isle Royale National Park, much less been there. That's partly because you have to cross a sizable part of Lake Superior by boat or seaplane just to reach the park. Once there, you'll find an untamed wilderness and a solitude found in few other places in the country. Hiking, canoeing, kayaking and even scuba diving await.
Photo courtesy of Ben+Sam