More from Smarter Travel
10 Thrilling National Park Trails
National Parks ... For Sale? Proposal Would Help Pay Off National Debt
World's Most Secret Islands
Talk about undiscovered: The National Park Service estimates that Yellowstone receives more visitors in a single day than Isle Royale National Park sees in a whole year. Be among the 15,000-some visitors who step onto the island's unspoiled Lake Superior shoreline and into its rugged forests every year. Canoeing and kayaking are two popular ways to explore; a number of guided tours run throughout the warmer seasons. By water, you can visit the Passage Island Light, a picturesque Gothic lighthouse that guides ships into Thunder Bay.
Ben + Sam / Flickr)