Kobuk Valley National Park

There are no roads to this magnificent 1.7 million-acre park in north central Alaska, that's about as remote as you can get, pristine, and solitary. You'll have to fly to Kotzbue and go by air taxi into the park. Some 500,000 caribou cross in spring and fall on their way between feeding grounds. At Onion Portage, you can see archaeological evidence of prehistoric tribes who hunted the caribou. The park is home to grizzly bears, mink and musk ox, and the Kobuk River is a fisherman's paradise. Forty miles above the arctic circle, sand dunes rise as high as 100 feet, and reflected light brings summer temperatures to 100 degrees.