Isle Royale—the second-largest island in the Great Lakes—lies anchored out in Lake Superior, the largest freshwater lake in the world. Isle Royale National Park encompasses the entire island, plus its surrounding 450 smaller islands. One more superlative: the island’s moose and wolf populations have been the subject of the world’s longest-running study of predator-prey relationships, begun in 1958. And an anti-superlative that works in your favor: Isle Royale is the country’s least visited national park. No crush of visitors here, just wildlife, wilderness, lighthouses, ferries, and waterfalls. First you board a seaplane or ferry. Once there, catch a water taxi to trailheads and lighthouses, hike, kayak, canoe, and scuba dive. Don’t join the crowd, visit Isle Royale instead!