The Northwest Arctic Borough covers 38,000 square miles in one of the world's most beautiful remote areas. Much of the region lies north of the Arctic Circle. The surrounding terrain is Arctic tundra, dotted with hundreds of lakes and rivers. Within the region are several protected land areas including Noatak National Park and Preserve, Kobuk Valley National Park, Selawik National Wildlife Refuge, Great Kobuk Sand Dunes, Cape Krusenstern National Monument, Gates of the Arctic National Preserve, Bering Land Bridge National Preserve, and Alaska Maritime National Wildlife Refuge. Wildlife is abundant, with caribou, moose, bear, salmon and sheefish constituting a significant portion of the local diet.