Wrangell-St. Elias National Park

The largest national park in the U.S. at 13.2 million acres — six times the size of Yellowstone. Wrangell-St. Elias contains 9 of the 16 highest peaks in the country and the Malaspina Glacier, which is larger than Rhode Island. The abandoned Kennecott copper mines are a perfectly preserved ghost town from 1938. About 74,000 people visit per year. For context, that's one person per 178 acres.