Located in Alaska’s arctic region, Kobuk Valley National Park was established to protect the 100 foot tall Great Kobuk Sand Dunes and 61 miles along the Kobuk River. It has no trails, no roads, and few visitors, but plenty of caribou: 500,000 of them migrate through the park twice a year.

If you decide to check this off your bucket list, come prepared: there are no developed facilities within the park’s nearly 2 million acres.