No roads, phone service, Internet, or campsites. That's how it is in Alaska's most remote national parks, and Kobuk Valley is no exception. The upside? No crowds, unless you count the half-million ...

Half a million caribou migrate through this park, crossing the Kobuk River and Onion Portage, according to the National Park Service. An 8,000-year tradition of hunting caribou here continues on.

Hikers trekking through Kobuk Valley National Park in Alaska during ... specifically those connected to the Akillik River, ...

While Zion National Park is managing summer crowds, 10 spots will see a small fraction of the millions of visitors crowding the most popular parks.